"How I spent my summer vacation" or "How not to do a gravel driveway."
Our recycled asphalt/road base drive needed replacing as it was more mud after a storm than a drive, so here is the saga. Gravel was chosen due to cost as a properly prepared & installed concrete drive would have been in excess of $20,000 & an asphalt drive would have been 1/2 to 3/4 of that. With our expansive soils & the cost factor, going gravel made sense. I estimate our cost to be in the $2,500 - $3,000 range since we did the work ourselves.
What I don't show here are the collateral projects of installing an irrigation valve box & its piping, some buried storm drains & my front sidewalk reconstruction.
At the same time that we were placing road base & gravel on our drive, we did my neighbor's drive, so it was a 2-drive summer. They didn't need any trenching though.
If I had to do it over again, I would have put an equal three part mix of concrete road base, 1" x 3/4" & 1-1/2" x 3/4" concrete gravel.