That kind of project can be done solo pretty easily. The worst part about that project is the 6x6 posts that are approx 12' tall, I've stood 16'+ solo before.There would have to be four or five guy's on a job like that.
None of them knew or cared.
I built a deck for an engeneer more than a few years ago. He said wow, you like to overbuild things.
My reply was, It's nothing personal, but if you and I never see each other again, we're both happy.