I'm finishing up my brightmount now and it only took an entire year and blood, sweat, and tears.
That's with some pretty big breaks of course, but between all the project stages it's at least several project days for even a competent DIYer I think. The way I did involved: Power augering footer, setting and aligning sonotubes, the concrete poor and anchor setting, and finally assembling.
Each of those are like two project days for me, especially aligning the sonotubes that was a painstaking process. And it involves setting the anchor bolts along a string line during the concrete pour. All that is paying off now during assembly though which is going well.