Been making a low Roman workbench and getting informed about low-cost, low-tech workholding. Above is a system of holes on a bench, together with pegs and wedges, that can be used for holding boards in different positions for planing and for working on the edges. Got the idea from the "Ingenious Mechanicks" book that Rex Krueger recommended on his "workholding on the Roman workbench" video, where it's described as a traditional Estonian carpenter workholding system; and also from a YT channel called "DW Woodworks" who has a video called something like "workholding on the Roman workbench part 2".
The pegs are made out of branches of a local tree they cut down that I partially got home, and the wedges from a reclaimed board I found on my street lmao. Woodworking is FUN. Highly recommend the "woodwork for humans" series of videos by Rex Krueger following your "poor man's carpenter" idea