Can you install an electrical sub-panel, wire 120/240V circuits, put in a ground rod, connect wires to a motor that has instructions for both 120/240V?
That would cover most of the skills. If you understand volts, amps, watts, and "ampacity" or current rating of various gauge wire, those are the skills needed. If not you either have to learn or get someone with that knowledge of house wiring to do the electrical work.
Much of the labor is physically building racks and mounting PV panels.
My system is all metal conduit, so that was extra work. Most people use PVC.
There are all-in-one systems which are simpler - connect AC in, AC out, PV. But they wouldn't be large enough for you.
You can buy a "power panel" with several inverters pre-wired. That may be the way to go. With each inverter weighting 75 to 150 pounds, they may still be shipped separately, and you would have to hang each one on the panel, then connect wires in, wires out, and plug in a data cable.
I've seen panels for Outback that all the equipment mounted on.
For the larger SMA inverters, what I see is one box per inverter, which takes care of some wiring, but you still have to interconnect 3 or 4 of them:
MidNite Solar Category Products.
www.midnitesolar.com