Roofs, kitchens, foundations, hardscape, bathrooms, etc. are larger items.  

The National Science Foundation did a study in the early `1990s that found 55% of adult Americans could not correctly answer "does the earth go around the sun or the sun around the earth, and how long does it take?".

We also had to add additional support to the foundation, and added Granite counter tops through the house.

Anyways here's projections I came up with, the house needs new siding and it's fairly large, I guessed 15k - 20k, the front porch could use some foundation work I didn't know how to guess so I assumed 5k on that, then I blanketed myself a 10k interior renovation.

Total gut and rehab with heaving foundation.

There are a lot of variables to flipping that can eat up your initial capital such as foundation repairs, roof replacements, HVAC overhaul, etc.

Cracks in foundation walls are a different story.

He saved me 40 k 3 years back on a flip with bad foundation.

If you have cash reserves and some experience, then it is ok, in my opinion, to use other people's money to leverage yourself, but without a proper foundation, you are building a house of cards by using other people's money.

I am wanting, like many others to grow my knowledge base and develop a firm foundation as I move into my first accidental investment property.