This has been on before, although I make no apologies. It was inspired by a 40m design by W2UW (now a SK). My main issue was netting the receiver, although you may have a way of doing this. The rig must still be around somewhere - probably in the loft. As I recall, it needs just 14 parts including a single FET.
See https://sites.google.com/view/g3xbm4/home/hf-mf-and-lf/homebrew/80m-feter-transceiver .