Found out the builder essentially took the deposit and ran (is "facing litigation"). 

And yes, based on what you stated we would need more information but let's take it at face value - what if you don't show enough income to get a "traditional" loan?

When you get tenants paying low rent on month-to-month deals, you face choices.

Many lenders haven't faced this situation so they are quick to shut it down.

What are the book keeping and occupancy tax challenges that are faced?

We removed 4 walks (including load baring), installed 2 walls, added half bath, replaced all plumbing and electrical, added new eye brow porch, painted full exterior (changed color), replaced all flooring, new bathroom and kitchen layout with everything replaced (shower, cabinets/vanity, counter, appliances, etc), stocked with new furniture, added mini split, removed gas/wood fireplace and added a new electrical fireplace, and placed initial STR tenant in 2 months and 1 week.  

Most were from people who could barely put a sentence together and listing their whole life sob story.

The county auctioned off my house and now we face evict

Have a face of the business.

I purchase $100,000 face value of these bonds and because the current yield on these bonds was about 23%, I paid somewhere around $42,000.