My houses use concrete block walls with furring strips nailed to then that then have the drywall applied on top of that.

Thanks for reading the giant wall of text, I'm sure there is so much I could add too, so if there is anything you'd like to know, please just ask!

Question, is it important to insulate the foundation walls?   

My ideal property is one where some or all of these major systems behind the walls or hidden in utility closets are brand spankin' new, but all the cosmetic stuff (the easy and inexpensive stuff that you can see and adds the most value) is just awful, worn, dirty, dated, cluttered, and smelling of cat pee and cigarette smoke.

I'm not a 203k expert but I believe you can do them with 0 or 3.5% down....I live in an expensive market too one of the hardest things here is being able to do a non-major (no walls down, ect) renovation as required by the streamlined 203k, stay under 30k, and still get enough equity into the house. 

I rewired because:1) I changed the layout of the house to open concept which required moving several walls.

I don't know why the wall is so thin, a wall shouldn't be less than 3 inches or so from another wall but the shower tile was only 1-2 inches behind the drywall from what I can see.

Pictures don't show floors out of of level or walls out of square.  

hello folksI just start my first house flipping project and really need some good/cheap tiling guy, painter, etc. the tiling quote I got is about $3 a sqft labor only. for painter, I got $4,500 quote for a 2 story 1950 sqft house for all walls, ceilings, doors and trims. are the numbers seem right?

I just love the color of the walls.