I'd check for that before installing LVP and replace the subfloor where needed and treat any termite damage. 

This is my first extensively water damaged home that I may purchase.

However, my timeline is flexible, so I could end up staying for a shorter or longer period depending on future plans.In my research, I’ve noticed that many condos in Buckhead come with renter restrictions, which is causing me to reconsider this approach.

Really low prices bring dregs and all the work you did could get damaged.

This way the tenants will be held responsible for any damages. 

The ground is now about 4-5 inches below the foundation line and it's also causing issues with my neighbor's adjacent yard.

that caused me to turn to music, I haven't listened to music while working out or on a walk or working in the yard for years, its always been podcast time, in the interest of maximum efficiency.  

He hit a gas line (not a huge amount of damage), and there is an extra bill coming to me from the gas company for the fix/labor/material costs.

Choosing a professional restoration company seems really important, especially for damage like water, fire, or mold.

Unfortunately, appears you've gotten exactly what you deserved due to your poor screening.Hopefully, you've learned from this painful lesson.Hire a well-screened landlord-tenant attorney and evict them and sue for damages.