@Account Closed I don't think it's asking too much. It's your money and you're the one managing it. It's hard to manage the financials of any project where it's simply a "black box" (i.e. you put money into the black box and out comes something on the other side).
Since I'm a project manager by trade (in IT, not construction), then I tend to do my own project plan as shown in this PDF (http://www.fileswap.com/dl/Y0pnvHtHym/). I have my prices set for material based on what I can get it in Denver so take the pricing with a grain of salt for Pennsylvania.
This is actually for a project for a house I'm closing on this Wednesday so please don't pay attention to the duration of each task. I haven't put those in yet.
So I took this and stripped the costs and gave it to my contractor who gave me his quote for a price. I asked him to break it down by milestone (not necessarily cost per task as shown in the project plan). I do expect him to tell me what the kitchen will cost, what the living room will cost, etc. I want to know he's doing his due diligence like I am and not just giving me a random number off the top of his head.