If you really need the cabinetry space (or if there is ductwork, etc) you could still have a short bulkhead from the ceiling (making it a pass through).As for the bathroom in the title ... aren't most bathrooms enclosed .. at least in North America.

Although I agree that the price that was quoted by the OP is high, the comments above mine mentioning that ignore the ductwork and return issues involved in splitting a forced air central heating system into per unit heating systems.

I told him I preferred to pay the 50 for hanging the ductwork(which was what was complete) and pay the rest upon completion.

I had to have the ductwork cleaned everything repainted and the house scrubbed top to bottom. 

I will be fixing it up first though, mainly cosmetics and duct work, but I am assure with what path I should take to get the most out of it. 

To give some context, what I'm needing done is as follows: roof repair, 3-5 floor joists replaced or "sistered", surface mold remediation, 3 bathrooms remodeled, hardwoods sanded/buffed/finished, exterior and interior paint, drywall repair, granite countertops and new appliances in kitchen, new HVAC and ductwork, branches cut away from roof, gable vent repair, insulation.  

I've used RMB heating and cooling to do all new forced air unit as well as all new duct work.

Have you found any quality Duct work cleaners in the meantime?

No duct work currently.

We'll get rid of the old duct work because it was very obtrusive and wrapped in asbestos tape.Our #2 priority is to upgrade all the electrical.