When I purchased the unit, I had the room completely gutted and a new bathroom installed.

Just like you don't spend money learning how to install an HVAC system to a house because the one you bought needs a new one, use a financial consultant if you do not have the experience. 

@Jaron Smith usually the crawlspace is a ventilated area, so unless you plan to dehumidify the neighborhood I would'nt waste the effort and money to install anything in there.

Does anyone know of a reliable HVAC person that has access to used or new units that can do this install asap.

If you don't have exhaust fans in bathrooms, install those as well as one in the kitchen above the stove. 

Once you start getting in the $4+/sf range of this stuff you start getting some real tough, virtually indistinguishable product that has the added benefit of easier installation and being waterproof.

Finished the upstairs, including the 2 bedrooms and bathroom and finished installation of the upstairs HVAC.

Perhaps install some cut off valves in the water system at various places until you isolate the area of the leak.

Door slabs are cheap, install costs an hour or two for someone competent, with that said, I would tell them to pound sand for the attitude.

And now, installing LVP flooring.