Then finance the rest.  

Review check book to see when I will have enough to pay $4K now and pay rest next year. 

But you still have the rest of the house to heat.If the place is well insulated and has new doors and windows throughout, you might get away with a lower amount of heat.I would certainly get in touch with some other plumbers and make sure they tell a consistent story.

I would fix up your duplex and see if you can buy the rest (cheap) and fix them up too.

You can rest assured, though, that the bank will find numerous reasons to delay the closing.Without knowing the price, its hard to say how far apart you are.

Curious to know the rest of the story... 2 years later..

I was going to take a break, but after the family contacted me a month after my other place was rented and they needed to sell, I got the place off market, under retail value, and the rest is history. 

It seems like the complaint with CO/ALR outlets is that the rest of the wiring throughout may have pigtails or other methods of connecting that get overlooked, and those are also potential hazards.It may make sense for me to go play in the attic this spring and see how many sets of wires I can just replace with copper.

We seller finance 10-15%, buyer coughs up the rest.

The rest of the basement is dirt and low ceiling height though.