Attempting to modify bedroom of old Dutchmen

There's no possible way to estimate the labor cost from a keyboard. You could ask a few contractors to look at it and give bids. As to the financial end, I know very few contractors that will work without being paid upon completion. I've done it a few times and it's never worked out well.

FWIW, I totally rebuilt my rig and it took 6 mos. but I have all new mechanical systems.