First deal under contract and might back out. Need advice.

[Jason Hines]

We finally had an offer accepted for a multifamily that we plan to house hack in a great up and coming location. The current owner has owned the home since 1990 and has taken great care of it. We had the inspection done this week and just got the inspection report. Now that I've gone through it, I may back out, but that may just be me being scared. 

- Both of the gas boilers are from the 1950's, but are still working. No local HVAC places are open to giving me rough estimates but google is telling me anywhere between $3k-11k. Out of pocket, that's just too high

- The roof is modified bitumen and is coated with aluminum oxide. The inspector said its good, but said you can only coat it so many times before you have to replace the whole roof apparently.

- Getting insurance might be difficult too. The house was built in 1860 and my mom (home insurance agent) advises not to buy the home even though those are the only two major issues.

Any advice? Am I being smart here?