Ductwork also likely a challenge.Is this just unrealistic?

Here's some cost on my Rental Property Rehab. 2Br. 1ba. 1,000 sq/ft Paid $26,900, but got back $1000 in RE Commission.Install 2ton Rheem H/A with all ductwork and Registers parts $2,800+ $600 labor (Cheap IMO)Paint walls, ceiling, & cabinets

I did the rough and trim with a local A/c Company installing duct work and system install.

They won't require a bunch of new ductwork so the abatement guys will have less to do.

We did whole house siding, all new windows, sheetrock the whole basement, rerouted some plumbing and duct work, electrical, kitchens, baths, floors etc.

The contractor will run the gas, ductwork and take out the old radiants, pipes and furnace.

Estimated rehab costs, again at worst case, total ~50000.Exterior costs, including gutters, soffit, siding, landscaping, and concrete repais, all minor, total ~3000Interior gut and refinish, including demo, drywall, insulation, baseboards, paint, doors, total ~10000Replacing HVAC components ~7000Kitchen Remodel, including appliances, cabinets, floors, and countertops, total ~9000Bathroom remodel, including vanity, tub, floors, total ~2000Mold Remediation in HVAC ductwork ~5000Dewatering issues ~5000Misc. costs and overages ~ 10000What do you all think?  

The basement only has 7' ceilings with low hanging duct work.

The wall isn't load bearing but there is a HVAC return in the wall and some HVAC ductwork in the kitchen soffit.  

@Jamie WooleyI've worked in Construction for 28 years, the last 17 in Minnesota, and have worked in houses with HVAC installed and running, or with Temp heat. if you install your new HVAC system, install a security system, then $200 to $300 will employ a guy to clean out the duct work after construction is complete.