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.

Samantha Reeves,Thank you for your reply I went through the Handbook , and although it's quite detailed , it seems to me that as Long as the Roof is in Good shape, there is no Peeling Paint on the Exterior of the house, and that the HVAC system is in working order , as well as there are no Safety hazards regarding  the property/house.What I'm not sure on though , is what if there's Some rotten wood on the exterior and or you want ( Need ) another $5,000 to upgrade the house .....new cabinets, faucets, flooring, re-paint the inside ?

I have been looking at Norada real estate and Roof stock and find their cash flow numbers differ greatly.

Change the air filters, make sure sprinklers are set and watering, landscaping done, check on cracks and leaks, visually inspect roof, also checking for pets, and how many people living there. 

I've got a SUPER SIMPLE SOLUTION that most people already know.No more racking your brain for workarounds.