@Jaekwan LeeA house hacking inspection checks for structural integrity, roof condition, plumbing, electrical issues, HVAC systems, windows, insulation, base and attic damage, unit conditions, and code compliance.

For example, I know many people who have bought a house in Ewing for $200k and it's renting for $4000+ a month and this person has put maybe $50k into it over a couple years including a new roof, updated cosmetics, and was able to BRRR out all the money.

Mostly because we have to add roof dormers and also for the expense of running the plumbing.

However, we faced a few unexpected challenges:A hailstorm damaged the roof while the property was under contract.The main water line to the property failed.

Plus all the necessary stuff, like plumbing and electrical, roof and gutters, all the things that a 100 yr old house is likely to need, unless recently handled.  

Before or after accepting:- Lower the sales price  or lower the sales price AND lower seller credit (only do this if you are confident in the sale)- find a value add opportunity (I've had situation where we put new roof on and split the cost 50/50 with the buyer via credits to up the home's value to meet appraised value).

We had already done exterior repairs to the house including a roof, and an AC.  

renovation including a roof replacement Did you work with any real estate professionals (agents, lenders, etc.) that you'd recommend to others?

Another thought - When purchasing HVACs, roofs, tree removal, siding, etc. you can very easily pay "retail" (just look for the biggest ad campaigns online) or you can save 30-50% by being your own GC and finding or going to the crews directly.

Short backstory; I’m a licensed builder in MI and have been on my own for 1.5 years completing structural restorations, insurance claims (roofs, siding, floods, etc), and about 15 or so bathroom remodels.