I have skimmed through the posts and decided to go on and start a new one, since this is gonna take a bit. The start date for my project is actually uncertain-awaiting the funding to arrive and hiring contractors and whatnot. My remodel will be in my parents' home and I want to make this great, great for them; they have worked very hard and now they are elderly and have health problems. I want them to love their home and be proud to have family and visitors in and for it to be functional in the event that they need wheelchairs, etc. As my title indicates, there is quite a lot we must do and there are a few things we want to do. Ultimately, the house will become a duplex and the remodel will accomplish the major changes for that: electrical wiring will be separate for the two parts of the house, with 2 breaker boxes, 2 water heaters, so forth. The house was built around 1970 and my parents have always lived here and my mother has hated the kitchen and dining area since 1971. So the kitchen will be a major area of attention, as will the back entry to the house. The bathroom is tiny and we are going to sacrifice some closet space to make it substantially larger, with a shower that is way more accessible. I have been under the house, and thank God, it appears to be structurally sound-the floor joists are in good shape, the floors are even, the doors and windows hang okay. I think we may have to do some electrical stuff, as I think the "juice" is insufficient in the house. My question, finally, concerns something a plumber told my parents: the bathroom sink worked for many years and then it stopped working and the plumber says that some type of vent was not installed at the time of construction and a wall needs to be opened up and this vent installed and run to the roof. I do not understand why the sink worked, then didn't and it is important to know because my parents like this man and want to use him for the remodel. Thank all of you who do know your craft for taking the time to advise those of us who need your help, and for being patient and kind in your posts-I checked before opening my mouth! I look forward to engaging with you as this process begins.