Anyone experienced in C class investments?

I'm an experienced fix and flip investor of single family homes, a licensed contractor and realtor in Northern Virginia.

What i would like to know is how increasing vacancies in a class A apts effects b and c properties.Also have to remember we are in year 10 of artificially low interest rates, and this financial engineering is INTENDED to rev the stock market and inflate asset values.And the next logical question is what happens as interest rates go up?

I currently work as a Systems Engineer for my company. 

I’m confused - hopefully someone more experienced can weigh in -Why would a bank take less than is owed on the mortgage if the property is worth 10’s of thousands more?

Any recommendations by experienced pros?

Multi-family properties are usually the easiest for an qualified engineer to perform a cost segregation study on, because the units are generally identical.

@Christian Fadul, any experienced real estate attorney will know how to handle a wholesale deal.  

They were engineered as a more mechanical/maintenance space in the home.

need strong active and experienced alpha male type manager who will vidit walk thru inspect monthly . most downtown lewiston is sec 8 and non working adults. a large population of class d houses that are damaged and tenants here work eviction court system every Wednesday.