I don't...yet...that's why I ask. Current skill level is basic switch, outlet, lighting, etc. wiring...BUT willing to learn. YES and have a real electrician do the final inspection and hookup.
I have a 17K generac because I have outbuildings with plumbing that are still on electric heat.
Plus I have a well which takes a lot of juice, and I live in the mountains which means plenty of cold in the winter, AND heat/lightning in the summer and wind the year ‘round.
As somebody mentioned upthread, your dealer and service rep are the key to generator performance and satisfaction. My guys suggest a tune-up annually but have been doing it every other year because we haven’t had long-term outages.
A check-up/tuneup isn’t cheap, 300 bucks or more per visit (part of that is that I am 100 miles from the dealer). But my guys know their stuff and really go through it.
When I ask them if I can skip this or that expense, they always tell me “depends on how much you are going to want power when the lines go down at 20 below.”
p.s. if you live in colder climes buy yourself a little thermostat plug-in which will keep your battery warm in the winter.