Hey Cody!
In my experience, it's a bit unrealistic to exactly determine cost of repair vs value in resale or say which repairs are most valuable. So here's a thought experiment:
Would a car with a dead engine, but fabulous paint and rims be worth more or less than a working car with stock rims and factory paint. I bet it'd be worth more, because it's practical and useable.
On a flip, it's the totality of renovation that is required to sell the property for maximum profit. That's not to say, put in the best finishes and fixtures, but more like "improve everything that needs to be improved," and then you can consider elaborate design.
Taking that idea to a flip, if I said "a $15k kitchen renovation turns more profit than a fresh paint." That's coming from a place of ignorance in more than one regard. For one, what if the kitchen is already updated, and the paint is gnarly? (or vice versa) And second, if the kitchen is renovated, but the rest of the house is not painted, does the fancy kitchen yield the same profit? Probably not. Or for that matter, is any of it worth doing if when you go to sell, the roof is on the brink of death...
That being said, rather than explaining what should be fixed, I'll try to say what should be "nice," or "in good working order/not needing repair" before listing the average flip, and I'll try to do it some kind of order of importance, but again it depends greatly on the market and a flipped home is the complete product, not necessarily just the important pieces.
Mechanicals (HVAC, hot water heater), Plumbing & Electrical, Paint/walls, Flooring, Foundation, Kitchen, Bath, Doors, Siding/Exterior paint Windows, Roof...
I probably missed some, but I hope that's helpful, and gets the point across!
Good luck in your endeavors, and feel free to reach out directly with any specific questions!
