The city requires the garage concrete floor to be a certain thickness when it is inhabited vs. just used for vehicles, so I know someone who had to excavate the floor then pour a new foundation that is the proper thickness.

In this business, like most other businesses, you have to be thick-skinned, assertive and inventive.

They can make short work of thick, old (i.e., hard) concrete.

Congrats on getting started @Catherine OBrien and welcome to the forum.You certainly are in the thick of it, being in North Florida.

Looks like your already in the thick of it, but there is always more to learn and do, this is the one place with a vast amount of individuals who are very knowledgeable, along with a lot of resources.  

If flange is a quarter or so below finished surface, Im comfortable just using a Jumbo or extra thick ring.Being a remodeler, Im always thinking of the next guy cuz I so often wish the last guy had thought about me!!

Grow some thick skin and don't get involved in tenant drama.

As soon as it's realized how much work it truly entails, and how much of a numbers game it truly is, and how thick your skin needs to be, the "students" bail.

But what I can tell you is if you want to reach out to sellers directly, you need a thick skin.

Talking with people and facing rejection and insults takes a thick skin, and not everyone can develop it.