Now I’ve been running up my credit cards to finish my rehab since I don’t have my money.

This has been true about every technological change in the industry - those who fail or refuse to adapt lose while those who embrace new tech win.

It will co-exist with other "new" payment methods such as google pay, apple pay and credit card etc, because the target customers are different.

If you are planning on living there (ie in 1 unit) then you are house-hacking and this is a different calculation consideration then renting out both units and making it a true investment.

Only other wild card is if they destroy the house on the way out.

This is especially true in appreciation markets.  

If it’s too good to be true, it is or you don’t understand the risk.

In Ohio, it’s true that you’ll need to file the eviction notice yourself or hire an attorney to do so.

Be responsive, communicative, deliver on what you say you are going to deliver (e.g. photos are true representation of your properties, amenities reflect what you actually have).  

Your true return has to be risk adjusted.