I would start with that route and look at other markets for scaling purposes after @Sean Dillon

You would need to some your research and decide which route suits you best. 

Nothing illegal about doing that, but if caught, the lender may call the loan due and if you don't correct the situation or pay the loan off, they willstart mortgage foreclosure.3) You could also go the HELOC route to tap the equity in the home, but the 12-month owner-occupancy will also apply AND the interest rate on the HELOC will fluctuate with the Fed Fund Rate.4) You could do a cashout refi as an investment property, but that will be at an interest rate 0.5-1% higher than owner-occupied rate.Suggest you meet with 2-3 lenders to explore your options about the above.Once you have access to funds, recommend you buy a 2-4 unit with 20-25% down. - You can buy owner-occupied, live in one unit, and fix up and rent the other unit(s).- If you're handy, recommend buying a property in the worst condition you can tolerate.

Is anyone else going this route with their advertising to try to create a niche for their rentals?

Another great option is the BRRRR method (Buy, Rehab, Rent, Refinance, Repeat), where you buy a fixer-upper, renovate it, rent it out, and refinance to pull your cash back for the next deal, and this is a good route because most private lenders can go higher LTV than on a rental loan! 

However, your lending choice will ultimately determine the best route, as rehab costs may consume a portion of your $50,000 investment budget.

I see various large bookkeeper options at about $100/month if you want to go that route.

I would suggest taking the route of option 2 or 3, so not only are you saving over 10k in rent per year but the residents help in paying down the debt.

If you go this route, be aware that you’ll lose payroll deductions—so you’ll have to track contributions on your own (see IRS Publication 969 for HSA rules).2.If You Own a BusinessIf you’re running an LLC or S-corp, you might be able to fund an HSA through that payroll.

Yes, if it’s just a web frame cross-development framework that lacks any ability to leverage a device’s native capabilities then the cheapest route to market via web certainly wins.