Pinched field line on septic and likely some other septic issues. 

Some questions I have:- Are mistakes common on a Radan test?

As others noted, more beds and baths tend to be a very common way to force appreciation.  

Home Depot and everyone else has solid core lvt that is snaplock, floating and rigid so no subfloor issues.

Another concern i have is the backyard has a BIG hill which is pretty dangerous to mow and could be a liability, however i could always include lawn care as part of the rent to avoid safety issues.

Make sure to reach out to one that is an investor savvy as location is no longer an issue. 

There are some who believe all plumbing should be done by licensed plumbers and using unlicensed person for plumbing has risks that are unwarranted.The issue as I see it is useful life of faucet likely means replacement cost should have been prorated.  

@Josue Soria5 years ago this was extremely common.

How do you deal with the zoning issue with your clients?

If you aren’t doing the work maybe lpv is a better option or if the tenants will have an issue with a really loud sander being used continually for a whole weekend lpv could also be a better option.