Each method serves a different purpose; hammer for nails, screwdriver for screws.Most of the time it's enough for smaller deals to figure the cash on cash returns.

There are other methods beside small claims, but small claims is one of them.  

The report revealed it needed a roof as well as the structure below the asphalt shingles, there was mold in lots of different places, issues with plumbing and electrical, and more.

Stay away from major plumbing, electrical issues, etc.  

It may need all new wiring and plumbing.

BUT if something comes up like roof, foundation, HVAC, major plumbing or electrical that was unforsceen that could put you back another 6-15k and more.

@Rob Buffington Being that it's less than 5 units, an appraiser is going to use the comparative method rather than the income approach so you need to get some good market comps.

method=showPopup&faqId=1-6KT-879

Meaning a fitting in a pipe that was worked on 9.75 years ago bursts, they allege that it was a defect from the plumbing work done under your GC supervision, they can file lawsuit and if they can prove negligence to 6 people that could not get out of jury duty, they win.  

I viewed a house today with some serious sub-flooring issues.The house is built up off the ground and the plinths underneath are clearly collapsing.The tile floor inside is still in good condition but the floors slope up and down.Can anyone give an idea about methods and cost for fixing this?