Leverage is the method investors use to increase cash flow.

I would say the biggest concern with a condo association is to make sure that the association is in good financial standing. 

Normally, you would wanna separate your properties based on risks ( kind of tenants or area), value ( not more than 500k in one LLC), location, and other preferred methods. 

And what are some good methods of advertising in general?

I will avoid 3 bedroom on top of the vacancy concern.

My concern is that the business having such a low % of tenants that complete the process that it seems as though a good part of the reason that RTO / Lease option is so popular is that the failure rate is what is driving profits. 

Do any of you use this method? 

You mention UDFI not being a major concern but what about UDIT if I decided to finance? 

What you mean is the property is in flood zone X (least likely to flood, flood insurance not required).My concerns are:1.

I know imputed interest was a question of concern in the beginning too.