Hello, We're in the middle of a bathroom renovation. When we opened the walls, there had already been (3) notches in the 2x4 studs for the vent pipe. The notches are about 60% through. We a plumber come in to do the pipework and he went and added one more notch. I'm obviously concerned about the structural integrity of the wall. Before: [URL="http://imgur.com/dJRmoRc"]http://imgur.com/dJRmoRc[/URL] After: [URL="http://imgur.com/mpD0moU"]http://imgur.com/mpD0moU[/URL] I don't know if this makes a difference but I'm mentioning it anyways. The window to the left (currently tarped with a black tarp) will be closed up. The window that's open will be enlarged to a 24x36. What are my options? How concerned should I be?

I'm by no means a handy person and honestly have no clue what's going on with my home. The house is 55 years old, built by my grandfather, who was a semi-functional alcoholic. If you saw the house you would understand the relevence... There is about 3 feet of crawl space underneath, but no way am I going under there ( I have some friends who would though). My grandmother always called the house a bungalow but it's more like a box. There is one story and 5 rooms, 2 of which (living room and 1 bedroom) have no obvious problems. The main door leads into the kitchen/dining room area and as soon as you step in there's sagging floor. The area between the floor and the door base is separating and you can see the ground. [ATTACH]76447[/ATTACH] To the right is the kitchen area where you can feel the boards under the laminate. Some higher than they should be, some lower, and some spots where it feels like nothing is there at all. The sink base has been in the house since it was built and is completely rotted out underneath - you can see the ground in many spots. [ATTACH]76448[/ATTACH] The bathroom is the worst as it seems to be separating from the rest of the house. The doorway has a huge gap where you can see the ground and the floors and walls are separating. I'm crediting this damage 100% to my grandmother who, bless her soul, wasn't a neat freak (putting it mildly) and left standing water for days at a time (mainly from toilet backups). [ATTACH]76449[/ATTACH] I'm also pretty sure there's no traditional subfloor iin the bathroom, just a few slats of rotted plywood (or is that the subfloor?) [ATTACH]76450[/ATTACH] Aside from the entry the rest of the dining area seems solid, no sags. I'm pretty sure some joists need replacing but I'm not sure if it needs to be done throughout the entire house or just in the rooms with issues. The one positive (I think) on my side is the rooms are all fairly small. bathroom - 7 x 5 dining room 8.5 x 12 kitchen 8.5 x 9 I've been reading up on DIY repairs but it all seems like Greek to me so I'm hoping someone can lay out, in lamen terms, what I need to do and the cheapest ways to do it (I'm on a tight budget after paying 13K in back taxes just to keep it in the family).