Eventually the maintenance comes back again: The turn-key homes have typically had most of the things that needed maintenance replaced, but they eventually come back, and they can be quite the headache. See the wonders of having a plumbing stack going past its useful life, land resettling leading to having to do regrades, or lift concrete slabs, or just general tree maintenace.

Don't do your own trees! Wood is very heavy! It wiggles a lot! Dragons!