Has water come out to scan for leaks? 

You do not want to be 4 weeks behind on a roof leak or mold issue.

But understand the type of risk could be the exiting tenant having poured cement down the drains, no appliances, no cabinets, a leaking roofs with mold inside the house, no AC,  or squatters having lived in the house with untold 'grossness' being left behind for you.  

it sold for 2.2M.the property was a huge project also... leaking roof, mold, plumbing, lots of termites, 1970s everything. 

What type of work is typically recommended for an older (mid 90's) single wide mobile home roof that is not leaking but that is very old looking? 

We had a surprise at the end when we were getting ready to re-rent and had gas leaks in all of the units.

And I didn't detect that at all. 

One property we bought had four major roof leaks and blue tarps and cinder blocks on the roof. 

If you want a comprehensive mold test for areas with water damage history (not including remediation), or if there's been an internal leak, it's a little extra or $500 from another licensed mold specialist.

I painted it, redid the floors, put on new doors and hardware, fixed all the existing issues (leaks in roof, toilets not working, sinks leaking, water damage on exterior and upgraded the panel to a 220V) What was the outcome?