Now that I officially know about the mold, I may have to pay about $20K (2 estimates so far) to clean it up, taking it back to the studs in some places, pulling back the baseboards in others, then cleaning with sporicide and doing air scrubbing in order to get an official clean bill of health since i can't rent or sell without that, having officially established that I have mold.

I custom built my house and even after having an air tight contract, I had to fight with them (and give in a bit) to get a contract release so that I could convert my construction loan to a permanent loan.Would need to understand your situation and chronology to understand where you stand.Did you have a direct contract with each contractor?

Rehabbing windows and starting interior millwork.Closed Cell spray foam under roof for air tightness and max R-value in shallow rafters:Basement walls lines with 1.5" EPS foam board before framingSuper expensive historic reproduction windows that meet egress

In the end, we put in an entirely new central A/C and forced air heating system, all new pipes, new sump pump, and a lot of new electrical.In any event, despite being way over budget, I think the rehab came out pretty nicely…The exterior:(Before)(After)This laundry room space later became the breakfast nook and part of the kitchen.

productId=3747685&Ns=p_product_price|1&pl=1&Ntt=broanIt uses a 6 inch duct instead of a standard 4 inch, so it sucks a lot more air. 

If you're not setting aside that CapEx money youre going to be hurting when three of the air conditioners go out at the same time. 

Need heating and air 

I did not want to replace the tubs, and the refinished tub looked much better than before.If you are using it on a higher end rental or on your personal residence, you may have higher expectations.Please note that you should definitely have a lot of air circulation (ventilation) in the room - the smell/fumes are quite strong. 

Boiler or forced air furnaces,If boiler is piping wrapped in asbestos 3.

LolHey we’re on BiggerPockets, not firsttimebuyersfordummies……if you NEED a realtor to hold your hand with regard to values of crown mounding or air handlers, hey go for it.