Need advice on inspection report. Knobb and tube and others

[Amer Swid]

Hello,

So the inspection report came back with these red flags, the offer for the house was 300k, then i asked for 25k reduction and they take care of all the hazardous stuff but they said IT ok for 25k but you take care of everything. I countered offer with that I will take care of everything except knob and tube (they will take care of that after the electrician go and check the place). Its a two properties (in 1900s) and the offer now is 275k and they will take care of knob and tube.

Anyone know how would approximate be to:

1) put chimney flue ( I asked and it will be 2.5k each)

2)do knob and tube rewireing (i heard it will be costly around 30k, but I asked the seller to take care of this otherwise ill walk away)

3) change furnace (4.5k$)

4)pluming (I checked its around 3k$)and asbestos (not sure if I should do anything for the asbestor) ( will take 5k max), all houses here has asbestos, so as long as its stay and no one touched then we are good and if the fixes is easy by putting just tape.

What do you guys think about this deal.

Overall rent will be around 2900/month