I also had to pay attention to where the sink drain and vent should go. The water supply pipes would need to be installed after the foam insulation was sprayed so it would end up in the warm side.
I hired a local contractor to do this installation because they could do it right away. They didn't do a great job. The thickness of the foam varied widely; some places it was super thick, others barely enough. So the worst places in the ceiling, I added fiberglass bats left over from other projects.
Tony Reynolds, the guy that hung the sheetrock in our apartment came in to install the walls and ceiling here. He and his helper had it all hung in less than 5 hours. Even if I was physically capable, it would have taken me forever.
Now, it's up to me to do the taping and mudding. Then, paint, cabinets, trim, countertop, island, lights, sockets, switches, etc., etc.,,,,,,,