I think the carpet helped to ruin those spots by holding the moisture to the floor.

You should have a conversation with the HOA about the repairs made and why there is still moisture penetrating the structure.

Keeping the moisture out of the bathroom with help a lot long term. 

Replace carpet for vinyl plank, add gutters, moisture barrier in crawl space etc...   

We upgraded the electricals, did moisture & termite repair, and some other little things which add up to additional $15K.

Many inspectors don't test for things like moisture penetration around windows, some do.

So anytime any work had to be done to plumping, run phone/cable lines etc. the ceiling had to be damaged to gain access to the mechanical's of the house.Also, it was carpeted and about once a year in the spring moisture would seep into the basement and I would have to be diligent to get it dried up or otherwise it would cause mildew/moisture issues.

If you are using a Tramex Moisture Meter and the level is 0%-2%, no moisture barrier is required.

We try to get a legal co-signer and an extra deposit, since we can't do as rigorous screening without a SSN.One other thing we have found is keeping up with maintenance inspection and keeping up with moisture/mildew/mold issues. 

Something that size would usually sag and crack before it gave way, and there's usually a moisture-related reason why it would sag and crack.Some people on this site have never seen an act of God they couldn't find a way to at least try to pin on their tenants.