It certainly has a large dependency; you are at the mercy of that one OTA.In addition, unless you are at ideal occupancy, alternate platforms can fill some holes.  

Its return is achieved due to an alternate rent model.  

Most alternative investments work just like pretty much all RE niches work when deployed effectively.   

An alternative investment would be a doubling every 7 years

.: I'm looking into alternative ways to sell a rundown house for my parents.

Alternatively, you could split it between House 2 and 3 in a way that covers your building budget for the apartment.

There is a much better alternative!

Alternatively, if you leave your paycheck in your checking account earning .01% interest, there is no real benefit.  

Should I rather go look for other cash flow positive alternatives at this time?

There are also others who assist in teaching you DD.Another route is to find a broker-dealer who invests in alternative investments like real estate funds as they will have done a lot of DD on the sponsor as well.