hmmm :/ how easy is it to find schematics for a fairly broad spectrum (by which i mean supports many variants of pic) dev board? If it was for just the few projects I would be fairly certain I could build one perfect for me but I'm finding that I'm gradually expanding my list of projects and each requires more stuff. I am fine with spending a bit of cash if it gives me a well rounded system which I can play around with a fair bit.
A list of the projects I am looking to do:

-Display and logging of data from various sensors placed around a car (including material stresses, temperatures, revs, suspension flexation) and twinning it with GPS data and road surface mapping

-Remote controlled swarm of small rovers able to keep in synchronized pattern and complete land surveying.

-A automated control system for my aeroponic farm system to auto adjust mist generation for optimum moisture in the thin film as well as to read ph levels of the soil to check for under/over nutriated water

-A CNC machine (for small mechanical parts creation for the rover swarms)

-A controller for a vortex air multiplier turbine which will optimise the blade angles on the inner and outer turbine ring.

etcetc