Obviously, the best approach would be to map out all the interior CapEx items and their expected useful life.One more thing to keep in mind: exterior CapEx might be "covered" by your HOA fees, but if the HOA isn't well managed or there's a big unexpected expense, you might get his with a special assessment.

Even better is tailoring your offer as to allow for multiple exits in case of the unexpected (interest rates may be at 8% in 3 years - who knows?).

We learned a lot about working with contractors, estimating repair costs, unexpected expenses, sometimes paying a professional to complete the work is worth your time and money, cheap labor is not always cheap

Savings for those unexpected repairs, etc is a must.

Seriously, it’s going to take twice as long and cost twice as much.(5) If the house is 50+ years old and you’re going to hold for long term and not flip, budget to replace the old Cast iron plumbing ( I found roots growing into my sewer line after closing, A very costly unexpected expense). (6) Finally, stay Positive and remember the whole point of the first deal is just to get through it!

This negotiating skill also comes into play when repairs come up after the inspection, or there is some other unexpected issue. 

This would bring in more cash flow that could help with any unexpected expenses with your mother. 

Ideally the reserves would cover anything that came up, but you never know when a large unexpected expense comes up. 

Even if it's turnkey, all it takes is one unexpected event that your reserves can't handle and there goes your cash flow for a year plus.

You have enough to take down the deal and some in reserve for the unexpected.