Doesn’t seem too unfair. Ask the contractor for a detailed quote breaking down each part of the job,( by details I mean price for each work type and estimated # of hours to complete each work type) Example: Remove and Replace 3 ceiling fans. $75.00 per fan @ 1 hr per fan for removal, assembly, and installation. Total Labor Costs-$225.00, Total Labor Hours-approx 3 hrs. By having the contractor give you these estimated figures and times, you both have a clear understanding of the cost and time-frame. It also gives you specifics on exactly what your paying for and keeps you from being overcharged for a simple repair or replacement. By that I mean they may tell you that "we will install your tub and plumbing for $500", which sounds like a great deal but turn right around and charge you $300 to hang 1 fan which is a ripoff. Cover yourself by asking for a detailed quote so that you can see in writing that your getting a fair deal and not scammed. Ask for estimates on misc material costs also. If they say they have no idea, bullcrap, they know exactly what it takes to do these worktypes and can estimate probably within $50-$100 of what materials are gonna cost. By asking for this, you keep them from coming back 3 days after the work starts and asking for $500 more dollars cause they used more material. In some cases they are "hidden circumstances" that do become more expensive, however, by having estimates for materials and misc, they can justify those expenses by showing you what they originally estimated versus the new problem and need for more materials. Detailed quotes are alot safer to have and give a much clearer picture of the work, the cost, and the timeframe. Also, by having this, the contractor has bound himself to a written agreement prepared by him, and is obligated to fulfill that agreement to the best of his abilities. By you having it, you don’t get overcharged, asked for more money, you have an approx timeframe, and a way for comparing for what they originally planned on doing compared to any change in work, hidden problems, or any contractual agreements not satisfied by the contractor. I mean you say plumbing, are they just gonna reconnect the new tub to the old piping and drain, or are they gonna remove the old waterlines, add new copper piping, install new hardware and connections for the new tub, replace old valves/shutoffs with new, set, balance, and caulk new tub after replacement. See what I mean, get a very detailed picture of what it is your agreeing too. Your only helping yourself. Overall, price sounds reasonable, BUT, what all does that price cover. Good Luck with the project and Oh, by the way, I’m a contractor, I telling you how to keep me in check.