3) since I cannot replace the broken tiles can I charge them to fully replace the kitchen floor?

I'm expecting the HVAC/water heating to be a much more significant project, as there are a lot of questions I have that I cannot answer about whether I'd need to expand the gas service or electrical, whether I can run small-duct high-velocity in the ceiling easily or possibly along the ceiling inside the unit instead of in the walls, etc.If possible, we also would like to install in-unit washers/dryers in the first and second floor units.I don't know if any of the above would require expansion of the gas or electrical service to the building, or how I would go about setting that up.

Is it your experience that most commercial tenants expect some kind of TIA? 

@Creig GriffinWhat you can expect, typically, would be to put down any where from 10% - 30% on purchase. 

Basically two people in charge of selling can get difficult, so you want to cover yourself if things don’t go as expected.

I eventually ended up replacing the whole roof.At the end of last year, I talked to him about extending our agreement because I spent a lot more money than expected and had credit things to get in order.

We're finally gaining momentum with work the house so we're expecting to be able to rent them come May (that will make one whole year of holding and renovations... not our finest but we're still learning).I'll definitely be giving Granite State Credit Union a call soon though to discuss the refi with them. 

I eventually ended up replacing the whole roof.At the end of last year, I talked to him about extending our agreement because I spent a lot more money than expected and had credit things to get in order.

If one causes damage or is responsible for the damage caused to the neighbors' property, it would be expected that the person causing the damage would pay for it. 

But for just saying "Hey Joe meet Sally, I think she might have something you might be interested in", I think if they bought you a beer or a lunch after they struck a deal, that'd be a nice gesture and about all I would expect if it were me.