Next, she informed me that beetles were coming through the carpet "especially where dirt can still be seen from the lack of the ground floor being completely cemented."

Are they wood or cement?

There is cement with dye as well that achieves this look. 

I consulted a lawyer and they said that we should create an agreement between the LLc and us to cement the protection from litigation (I hope that makes sense). are there any general documents that would satisfy this?

There’s been a little more of this than usual the last 18 months as their vendor tries to sell an expensive spa,cement appliance as “all they can get soon” and I’ll have HD, Lowes, or RC Wiley install something they have on hand.Look at your agreement for the procedure and max repairs without prior authorization (TBH I never have.) ask them how much came out of the security deposit, an invoice from the vendor for all bills and work the problem from there.

If the leak is above the lowest floor cement, it should not be too big a deal, unless all the old copper pipes are ready to be replaced.  

The stucco, roof tiles and cement fencing don't require as much attention as materials in some other states.

However, solving the sellers situation will cement the deal.

I am rather inexperienced in this realm, and want to ensure we are not cementing ourselves with a poor choice. 1.

Focus on building relationships and cementing yourself with a good reputation amongst your peers.