I guess it depends on how handy you are, I did it on the day of install. I'd say I had 8 hours total for installation. But I don't work that fast. As for the electrical I wired my whole building after being shown once how to wire a grow room. I had some guys I would call and ask questions but I did the whole thing. So just depends on how handy you are, I can watch a video or have something explained and usually figure it out. It can be dangerous in a panel though so if your not comfortable might need to hire someone.
EDIT: also wiring up 240 is not that hard both wires white and black go to the breaker one on each side of the 2 pole breaker and the copper wire goes to the ground bar. Might want to mark your 240 white wires with red tape so someone else working on the panel knows they are hot.