I would be more concerned about the cause of mold given that it was newly renovated. you never know what's behind the drywall. basement moisture/leakage issue can cost a lot to fix especially it has been already finished. 

We Currently have a PM that is doing an OK job (we are probably over skeptical of his ability to manage, however, the home has been maintained OK, and we go up and do some general maintenance/checking about 2-3 times a year for some comfort of mind.. he is paid at 7% of rent).Purchase Price- 160,000 for Side by Side Duplex in B-/C class neighborhood built in 1950Total Invested Cash- $11,000Gross Monthly Rents- $2,000Monthly Cash Flow- $355CapEx- 20% due to being built in 1950Repairs 10%Vacancy 5% (very low vacancy rates at this time)NOI after all expenses including our mortgage +PM + increase in taxes due to non-homestead comes to - $12,350 Cash on Cash- 40%Cap rate- 7.25%Within 5 years- we anticipate needing some big expense items (Roof, replace main from home to city sewer, at least one furnace, possibly an AC and we may need to have concrete steps -up to four steps total- either demo'd and rebuilt/raised due to settling towards home and water seems to like to penetrate concrete block walls in basements.

I've fixed flat roofs before that had moisture build up, but this roof had a hole in it.

With the water issues in your state you want a good grade flowing away from the house anyway to keep moisture at bay. 

I think it goes without saying though that there could be issues because of roof penetration if the system is installed by less than reputable solar installers - due diligence on these then is critical.

Sand, stain and poly the existing wood floors (and obviously have something written into lease regarding protecting them within reason - keeping temperature and moisture regulated.)2. 

I just lost a shower/tub tiling due to cracks and moisture. ugh!  

The restoration companies have sensors that can detect hidden areas of moisture.

Not all planks are vinyl, but the vinyl ones have some advantages- 1, they are not destroyed by moisture, and 2. they can take some imperfections in the floor without causing squeeks or damage. 

The rain penetrated through the stucco and the wood frame siding got very wet.