Everything I'm finding says 27.5 years due to it being rental income but others say 5 years because it's an RV.

Im a huge fan of themI think both - they will bridge the gap with middle-income renters and also appeal to the higher-income bracket.

So, when Trump changes to no tax on tips I feel inclined to change my rental income structure.50% reduction in rent.Previous 50% made up from a mandatory nontaxable tip. 

Quote from @Mordechai Chaimovitz: Can someone please explain to me why people are buying 2 flats that rent comps show $4,600 a month in income for 665k+?

If your firend wants to stay in the place AND has the funds/income to do so, they need to refinance in their name ASAP (as part of the process), not 5 yeas from now, not if they remarry, not 10years from now.   

They're highly popular for turnkey rental properties because qualification is primarily based on the income generated by the property itself rather than the borrower.

How much income do you need, and how much do you want?

At that time, my friend encouraged me to get into real estate with the idea of creating passive income and wealth in future (via appreciation).

The rates are high right now but these loans are limited based on cashflow so you cant take a loan that costs more than you're receiving in rental income.

Lost Income- normally 18 to 24 months.