The flooring is mainly carpet with some luxury vinyl in the kitchen, dining room and entryway. 

I would like my first purchase to be the ground floor for many things in the future.

We added a private entrance/exit, turned 1/2 bath into shower full bath, added a closet and a kitchenette, so our entire lower floor is a fully private 2 room/1 bath STR, including laundry.Any issues arising from sharing a home with travelers?  

The other part is that in doing any single unit work, it appears likely that walls will be impacted in the below floors, if at least for plumbing access - which is an issue while tenants are in. 

This includes new roof, flooring, cooling, paint, appliances, windows, doors, and stucco.

We looked for a property that had a great view (21st floor oceanfront condo) that needed work inside.

The seller was offered a credit of $15K for all new flooring in the home (all new LVT).

Last week she sent a picture of a small hole in the linoleum floor and crack in trim which looks like she dropped a heavy piece of furniture.

I have been renting out one bedroom and sharing the bathroom for 4 years,, now I have improved my second floor with a new bathroom and renting out my second floor as Airbnb, and for now it is really great.

For instance, if there's an unresolved settling issue, you can probably see cracks in the foundation, buckling, un-level floors, un-plumb doors, etc. ...but, if everything is solid now on an old house, it'll probably remain pretty solid for the foreseeable future.