Savvy saver, 38, who earns $58,000 a year reveals how she's built up a fortune worth hundreds of thousands by moving into an RV - and is now on track to become a MILLIONAIRE by age 45

A 38-year-old woman who earns $58,000 a year has revealed how she has saved hundreds of thousands of dollars by moving full time into an RV.

Carly DeFelice, who is originally from Fort Worth, Texas, appeared on a recent episode of CNBC's Make It series to share her life advice.

The 38-year-old, who has a finance degree, lives in a 20ft by 8ft RV that she bought for $14,000 in cash.

She revealed that her annual cost-of-living is $25,000, which she argued is 'super low' because she is debt free, and she now uses the rest of her salary to save and invest. 

Carly, who is now a community manager at a co-working space, dished on her own journey to becoming financially stable.

Her family had not been wealthy when she was growing up and she took on a whole host of jobs to make her own money - including babysitting and refereeing soccer games. 

She graduated college with a finance degree in 2008 just as the recession hit and was left with $35,000 in student and car loans.

Carly decided to learn how to install home security, having had previous experience selling the systems during her school summers.

She paid herself $50,000 a year through a business account and manage to pay down her debt - a feat aided by her low rent of $500.

The financial expert eventually decided to set up her business, Best Money Class Ever, to offer personal finance advice to other adults.

She then decided to try out 'tiny living' which led her to buy the RV - along with an SUV - for $14,000 each.

Having set up home in the trailer in Austin, she sought community at a co-working space, where she later became the manager.

Carly, who now runs her business in evenings and on weekends, also revealed how she creates her budget.

'I keep it super simple. I look at my fixed expenses versus my flex expenses. I take an average of what I spend on utilities, and then I have my health insurance, my car insurance, I have RV insurance.

'That's pretty much it.'

She continued: 'The main expense that I have with my RV is the lot. So the RV is paid in full itself, but I do have to pay to park it.'

Carly said that she does often get hit with 'unexpected expenses' but she is always prepared.

'The biggest thing is I have an emergency fund, my emergency savings. I have over a year's worth of expenses in the bank for a rainy day.'

Discussing her day-to-day spending, the savvy saver revealed that every Friday she withdraws just $120 for the week. 

She said: 'I buy my necessities first - so groceries, gas for my car - and then whatever was left would be happy hours and hanging out with friends.

'It really takes the guesswork out of budgeting. It's just like, can I afford something? Can I buy this drink or whatever? Look at my wallet. If there's money there, I'll get it.'

Carly, who also contributes $1,000 each month to a Vanguard investment account, is part of the FIRE movement - financial independence, retire early formula.

She explained: 'Basically, what you want to do is you want to build assets 25 times your annual living expenses.

'Then you can safely withdraw four per cent and effectively live off of that for the rest of your life.'

Carly revealed that she had built a nest egg of over $100,000 by 26, adding: 'What that means is I could simply just let that money grow and work for me.'

She is now aiming to be a millionaire by 45 years old, claiming: 'I have mastered the art of being incredibly social. Having an amazing social life and also being good and saving my money.

'And I think the way that I have found balance is I realize that it is the experience with my friends that matters.'

The saver continued: 'If I do reach that million dollar mark, I would feel confident of not having to bring in an income with a standard day job or with my business.

'For me, though, that's not the end goal.

'I do feel like part of financial independence that appealed to me is the time freedom.

'I wanted to have, the freedom to spend my time as I wish.

'I don't necessarily want to retire. I want to spend my life reaching people and helping people turn things around with money.'

Carly's CNBC Make It episode has so far received more than 78,631 views and lots of mixed comments.  

One person wrote: 'I'm so happy for her!!! She's refreshing and her best money class sounds so helpful! I wish her all the best!'

Another person added: 'Wow. She is awesome and very driven. Good luck to her on her other goals.'

But other commenters weren't sold on her choice of living in an RV full-time.

One person wrote: 'This lifestyle is cool and all, but I feel like there is no in-between ever shown. 

'You are either living so frugally you are basically working just to save, or you are spending so much that you are working to pay off debt (but depicted in a way that you are living a successful lifestyle). 

'I am not sure why only those extremes are always shown in a positive light?'

'This is depressing. Cutting your expenses to the bone to retire early. With a finance degree, she could have easily made six figures a year and accomplished the same goal with a better quality of life,' a third person wrote. 

Progressive Insurance surveyed 501 Americans who live full-time or part-time in a RV to better understand the lifestyle's trends.

According to the study, 59 per cent of 35 to 44 year olds and 70 per cent of 25 to 34 year olds are remote workers. 

When it comes to getting the internet in an RV, 52 per cent of RVers use a hotspot, 35 per cent use public wi-fi, 21 per cent use a satellite and nine per cent use co-working spaces. 

Millennials RVers live in an RV for at least six months per year (69 per cent) and 21 per cent don't have another permanent home. 

When it comes to the greatest challenges that the lifestyle comes with, 45 per cent said it was finding good campground reservations and 42 per cent said it was driving and maneuvering the RV.

When it came to gas prices, 40 per cent said that was their hardest obstacle, while 37 percent said lack of storage space and 36 per cent said lack of personal space.