You must be somewhat of an appraiser and deal finder. It takes time to recruit your cosmetologists, but you will run across them in your travels. Friends and family usually trustworthy drain leak repair can provide you with some serious leads. Start networking and talking to tradesmen. Get their numbers and schedule them to descend upon your ugly duckling at certain times and watch the transformation begin.
When your drains are clogged do you go get the drain cleaner, do you look for a plunger, or do you get out the snake? Don't know which is best? Don't feel bad, most homeowners don't. That's because plumbing can be a complicated subject. For something as simple as a clogged drain just about any of those options will work to an extent. Obviously some of them will work better than others but which one really depends on the clog. For more problematic issues you might want to consider bringing in the professionals.
It would be good to have a couple of people around while the process is being done just in case there are accidents since acid is a very local water heater repair service hazardous substance.
Do you offer the type of pool container that I want (fiberglass, concrete/gunite, vinyl liner) and how much experience do you have with installing that type of pool?
Last but not least is don't hire someone just because they gave you the lowest bid. Next don't hire some handyman that does odd new toilet jobs, in some cases they can cause you more problems that down the road it will cost you more money to fix what these handyman broke or did wrong. Sometimes the lowest bid is going to cut corners and not do the job right or when they get there and start doing the work, they keep saying they are finding more and more wrong and you end up spending more than what you should have.
When purchasing a vinyl liner pool, you need to be cautious about what's included in the warranty for the liner. Is it just the seams or is it the entire liner? Most vinyl liner pool builders stress the warranty on the seam, but the seam never goes bad. What frequently goes bad is the vinyl lining, not the structural walls or the seam.
The bottom line is: You and your plumber need to decide if you truly have an emergency plumbing problem. If the problem is serious and you really can't delay getting it fixed, then by all means have the work done as quickly as possible. It will probably be cheaper in the long run to delay repair on a plumbing problem that is "livable" for the time being. You will need to weigh your options and discuss them with your plumber after he has evaluated your unique situation.