Plumbers are a breed apart. You would think they use gold for soldering your pipes with the prices they charge. My grandfather was a plumber and I trustworthy drain leak repair was on the truck with him at nine years old. A plumber may or may not give you a free estimate. With a little digging, it can be done. Just give them the work if indeed you do buy the house.
For maintenance, look at your owner manuals. Almost everything in your home has a manual and if you do not have the manual, it usually can be found on the manufacturer web site.
Check and make sure that the tradesman local water heater repair service has a plumbing license This is a very important step as you need to be sure that the man you are hiring for the job is a professional. If there was any damage to your property or bathroom it becomes much easier to make insurance claims if your tradesman is licensed. So make sure you check this before you start any work.
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?
Make sure that you call a plumber as soon as things start to act up. You will save a lot of money in the long run because you won't be dealing with the damages caused by flooding after the fact. Most people will find that they are not too willing to call in a professional water heater early on but it is worth it. It is better to pay someone for a minor issue rather than to try and fix it yourself and end up with a huge mess.
Glycol (Ethylene glycol) is the most common automotive anti-freeze but it requires safe handling. Ethylene glycol is a toxic substance that can cause death if ingested. It also pollutes the environment and should never be dumped in sewers or storm drains. Propylene glycol is a relatively recent alternative to ethylene glycol. It's less toxic but it's still a hazard and should be handled with care. In particular, keep both chemicals away from pets and children. Always dispose according to your local hazardous waste regulations. Don't pollute!
Cheap is not always best, remember this. Quality is the name of the game and if it cost a couple dollars more to ensure that you are going to get that, then that is what you should do.