Jeremy,The difference in the cost is probably reflective of a difference in coverage or limits. 

The location I am looking in is in a low income census tract so there is no income limit.

At those numbers this property becomes a liability, not an asset.

I am not interested in traditional bank financing since it does not line up with how I plan to expand or how I've met with my limited success so far.Quadplex is assessed at $275,000 and I collect $3,200 a month in rent.

I always want it in place so I know what the terms and amount limit will be (75% LTV/up to $$$$).  

In most cases dead equity will turn a asset into a liability.

As a result, my credit limit has increased exponentially.

So far we have tried Saturdays and Sundays with limited attendance.

But I'm not sure about liability if people would be walking through my home to get to the roof deck, using my bathroom, drinking alcohol, etc. 

You may not be able to limit the occupancy to two people for a two bedroom property.