Sometimes you'll get a pleasant surprise.

I'm surprised they haven't shut the water off yet with a balance that large.

Also, keep in mind potential market fluctuations—having reserves can help you navigate unexpected challenges.

That being said, I can certainly work within the 90k-120k refi.Depending on the area, I'm not surprised that banks/CUs would struggle.

State Farm is surprisingly good.

It's had some tenant drama, one eviction, and plenty of unexpected expenses.

The hairstylist, that's what they do 24/7,  Dentist knows the ins and out of your mouth and the restaurant is capable of basically save you time  and perhaps surprise you with new mist of flavors. 

It's not a big surprise by any means even if 40% of people assumed 25. 

How do you manage cost, unexpected surprises and keep the project on time. 10% to manage a rehab is actually pretty cheap, I suspect you have never done that yourself, otherwise you'd know how much work that is.

Once you take over the cabin there will be other unexpected items you will need to purchase no matter if the cabin is new or old.