As always @eb424 ... I like your enthusiasm and ideas. We need more of this in the predictable and stiff saxophone world. Too many clever and mainstream saxplayers are hiding beind a note stand in a band. We need more players to take a steep out in the front. London and England seems to be a too small and narrow for you. Have you ever consider to emigrate?
I have done many "hopeless" projects through the years. Organized "Rock & Roll Saxophone", workshops in a land without this tradition, local Rock & Blues project for everyone, local RockSax meetings with just a few honkers around, Blues and Rock Jam in the woodshed ..... . Lots of fun.
I have found out that if we were 2-4 guys to run the projects it would probably be a little bit easier to carry out. It's too much for one person. Too many compromises.
Check the "Christmas classic......Fairytale of" ... idea. It's a great idea but you have to ask yourself many questions .... . I hope you will get some positive feedback from yourself and you "open/start". After that you need some important persons . You already have your nephew .. but you need more folks to test/check your ideas with. Music, economy, what to do with the money you need during the project, play along music, start date of the project and close date ..... a good project name. ?????
Good luck!