Some of the things I have planned after we move in is to run ethernet cable so I won't have to use wifi all over the place. The crawl space under the house (it is pier and beam) is rather cramped, so I will need to dig out some of the soil under there to make it more accessible. I also need to get some vents going under the house as there are none at the moment to allow air flow. For some reason when the current owners had the siding redone a year or more ago, whoever did the job did not install actual vents, they just attached the vent covers to the siding in a couple spots to make it look like there are actual vents. I will have to take a closer look at the water heater to see what kind of warranty it has, but I do know it was installed in 2012, so I am confident it is at least at the near side of the end of its life.
I like tankless water heaters as they are more efficient, but I may need to at least install a recirc pump underneath the farthest fixture so that waiting for the hot water to get there won't be a problem.