I believe this house falls in the boundaries of the Historic District which is not a deal breaker by any means, just something to be aware of regarding any rehab on the outside appearance of the property. 

Also, your rehab is pretty low to begin with so I don't think adding another 5k expense is a deal breaker.

All of these would be immediate deal breakers (at least to any investor who requires doing due diligence before investing).

This may be a deal breaker for a separate home.

Have you ever considered it a deal-breaker?

The home had a Federal Pacific electric panel which was a deal breaker for us.

I also do 2 phase electric extensions from the breaker box, while adding a 2 pole breaker.

But I'm afraid of too picky inspections and that I'll need to remove all walls, ceiling and floor (basement has kind of inside crawl space - elevated floors for plumbing I guess)I'll do some apparent work anyways: add vents for bathroom/dryer/microwave, insulate and enclose the furnace (at least from thr bedroom), check for gfci/arc breakers, may be put resilient channels and more drywall to reduce noises from main floor.. also - add heating.. etc.Does someone have experience permitting someone's work? 

All sketchiness aside, $900 on a house purchase is so minor and shouldn't be a deal-breaker if it's factored into your loan.

He allocates a certain threshold beyond which it is a deal breaker.