Any help is greatly appreciated.My primary interest is in multifamily however with the competition for multi being high and the pickings slim, I am also very interested in single-family homes in C+ or better neighborhoods that cash flow well.Dave

If it's truly a C class area you will probably need to sell to another investor so your chances are slim to sell for more than you paid for it. 

The property has many value-add plays and many people in the local market perceive commercial deals as "off-limits" so competition for small commercial multi-family is slim.

Chances of half your tenants being able to afford to purchase is probably slim.

Whether account for them or not, they will come up and any perceived "cash flow" you have made up to that point will be wiped out and likely more with such slim margins.  

In my area of the country, the chance of an owner with a small number of properties facing consequences of choosing not to rent to unmarried couples is slim to none...people have larger concerns.

@Brent Coombs I only meant that as a way of trying to inflate the price I can pay to lock in a deal, but as Sam and Steven pointed out, the likelihood of getting an owner to carry a 30 year note is slim.  

I should be clear that I was brainstorming, and chances of success with any of the ideas I put out there slim.

I think the statistics of them actually buying are slim to none.

Opportunities for positive cashflow with any sort of ROI were slim to none.After months of searching with our realtor, and another long, discouraging day of looking at over-valued properties, we came back home and saw a listing for a 3bd/3.5bth condo that posted that day.