I rent month to month because I like the flexibility it provides in terms of asking people to leave without having to prove that they did something wrong.....the downside of that is I end up getting houses back in November/December which always means I'm going to lose 1 1/2 to 2 months rent.not going to say finding a good tenant in a week is impossible, but in my experience I get inundated with the people who have a history of evictions and other undesirable activity during the 1st week the listing is up, followed by a wave of much better qualified prospects. 

Locations that one may call "undesirable" but the AirBnB was 100% booked almost all the time.

I think a website "code" idea is going to be undesirable for many of your sellers. 

It is technically possible to have some partners cash out and the remaining partners reinvest in a 1031, but it's highly complicated and usually has undesirable tax consequences for the involved parties.

The property needs some tlc which is why it's a good deal but the small things that need to be fixed have made it "undesirable" to the 2-3 carriers that are left in this area willing to write rental properties.

@Michael LoweMy family is against it because my uncle had a duplex in an undesirable part of town (even though he lived in it too).

I use a similar method to what Bruce uses to eliminate undesirable properties then I drive by anything I might bid on and put my eyes on each and every property.