1 or 2 will work fine, 3 is a non starter. for a start, you will need professional indemnity insurance to teach anyone. they would have comeback against you when not if it all goes wrong
option 4 is a tried and tested route that works. project manage and oversee building projects for people that want to employ the trades rather than a builder. consultation fee to discuss the project and advise and a percentage of the final cost to oversee it fully.
good point! See I’m learning!!