DIY

I know people who have built bigger buildings by themselves. They work construction for a day job so they have a lot of experience and tools. Still it absolutely is possible.

That said, there will be times that help makes things easier. So if you can get some - even for a few hours - plan a head so help is there for the hard parts. (in my experience "Free" help works for beer: buy the good stuff, but not enough to get them drunk).

Lacking help, doing this yourself is about the tools. Cranes can be rigged up - ropes and pulleys. Your local rental center will often have tools you really need. Don't work on windy days, those panels can catch enough wind to turn into a hang glider (when they come down the panel is destroyed and you have broken bones)