My father studied to become a plumber and my mother worked in a dry cleaning shop.

The WORST solution is an unqualified attorney, because their mistakes makes whatever they come up with INFERIOR to an “off the shelf” solution.In between the two we have a good off the shelf product by a reputable vendor.  

Find a reputable lender.

Anyway;  I'm very surprised that leads that listed, expired, re put on FSBO aren't that motivated. 

Also, you can find out what work needs to be done by hiring a reputable inspector.  

Quote from @Tyler Newcomb: Contact a reputable real estate company in the area.

Bear in mind that Tankless units must be drained and de-scaled each year (by a licensed Plumber), or you will void the warranty.When I was building a lot, most people in the SD beach area wanted the tankless (generally only because they were cool and groovy).

I can connect you with reputable contractors, and management companies.

Luxury custom home builders can be a mix of different nationalities with finish carpenters, cabinet guys, HVAC, sparkies and plumbers still mostly local but many are older and getting ready to retire.

I've found a reputable builder who quoted $110K to rehab the burnt house, including expanding it to 1,200 sqft.