A lamp caught fire, damaging the outlet and causing $400 damage to the flooring.

GFCI outlets ($150)Washer and Dryer not working ($400)Safety glass in bathrooms (free - I can do this)Replace toilet ($400)Fix hot water supply to shower ($500-1000)Water heater is original ($500)Windows seals as windows are foggy-replace windows (suggested but not required)Upper unit needs new flooring and countertops likely. 

I have never negotiated build out before and I understand that I was going to need to add some walls and outlets anyway.

You can also look inside the panel (or have someone qualified do that) and see if there are any Al wires.You can look at the other end (fixtures, switches, outlets) but this may not tell you as it was/is common practice to pig-tail copper onto Al to allow Cu fixtures and switches to be used (they are far cheaper).  

I started with a bedroom: removed the trim, window casings, outlet/switch covers, and popcorn ceiling.

I'm sure everything will turn out. Let

The living area of the basement has lights, dry wall, paint, electric outlets, etc.

I'm not sure how I came upon this website, it must have been a week or so ago while I was looking for real estate investment education outlets.

I'm trying to get the electrician to fix the outlet and do a safety assessment.

Electrical - should be good, but insects may have built in panel and outlets or fixtures.