Your own work ethic will determine how long you can feasibly keep your head on straight at your current job.I can offer you small advice for when you do plan to exit (I am currently in this same situation)Make sure your wife is on board! 

Let's assume I take the same 50K, and purchase the same type of SFH every year.Home Listed at $210,000 - offer accepted at a 10% discount ($189,000). 20% down (37,800), closing costs ($5,000), and light renovation costs on carpet, paint, minor fixes, etc. ($7,200).

If the person still has their license, your threat of a complaint is usually enough to scare the individual straight.

.- Fees include the home appraisal, the application fee, the title search, the credit report fee, discount points, and the loan origination fee.- You might have to pay for a new appraisal- If your new mortgage rate is only half a percentage point lower than the old one, it might take 7-10 years to recoup the costs of refinancing.- if you’re refinancing into an FHA loan, for example, you’ll need to pay an upfront fee for mortgage insurance.This calculator might be a helpful tool.https://www.mortgageloan.com/calculator/refinance-breakeven-calculator

Find a discount broker who will charge you $500 or whatever to toss it on HAR. 

I didn’t start out part time, I jumped straight in as a full time agent and I feel this is the way to go because it forces you to stay razor focused on your business.

However, with the beginners guide and listening to a few of the podcasts here, I can't think of a more straight forward way to earn passive income than owning and renting property.

Also other people I know will advertise on airbnb/vrbo but they will do a discount for extended stays and advertise how close they are to the hospitals. 

@Craig GrayThe source of funding, cash or loan does not affect the overall BRRRR strategy significantly.The entire strategy is to buy something in such disrepair that you get it for a significant discount, perform a rehab that adds much more value than it costs, and then refi out some, all or more money than you put in.

I would only roll the gains into the opportunity fund, the remaining would go back to buying those same toys, vehicles, etc. being that I buy at such a discount.