I work mostly on commissions so the bigger the job the better! lol
I’m not sure what you mean about “how much do you spend on a project”… The cost is materials, hardware etc.. I often make my own hardware too. (I work in multi mediums)
I own 6 routers (4 plunge) and a Shaper. I have used inlay sets quite a bit.
I usually make those jigs out of aluminum.
I mostly use local woods..maple and alder but I also use walnut, bubinga, chakte-kok, blood wood etc.. The exotics I get ordered in but the local stuff I get locally. Sometimes straight from a log sort to a small portable mill, to a re-saw then air dry and kilned afterwards.. totally depends on the project.

Angellos