The 15% return is in paper and not sustainable. 

Then I paid for a consultation with one of their attorneys and it was very helpful and he suggested to keep it simple.

Send a written notice (yes, paper) to the tenants with proof of delivery required (the postal carriers have this time to an art form; it's inexpensive and you get confirmation via email or receipt very quickly; it does not require the tenant to sign - it just confirms that the notice was delivered.A paying, respectful tenant is golden.

For example, if you are buying in an area that is in are 1980s and above, you might run into a roof that is tile and the paper under the tile needs to be replaced the day you close.

But they are simple, respond quickly to questions, Lloyds is their underwriter, etc. 

What you want is, as they say: relatively simple, but not easy.

Create a simple spreadsheet or written list to compare the features of each and identify the ones that align with your requirements.

Those remote flips and high cash flow rentals are so tempting on paper, but they rarely go well in reality. 

So have to make sure you interview beyond just asking the simple "can you do this for me". 

Most folks chase paper-returns and overlook the real wealth drivers in REI.