Good news on the Methanol supply
My only helpful advise I can give after doing this for so so many years and having a car that works (that I actually daily drive when needed!) is to keep it as simple as possible.
Trust me you will get so much power and performance from a single Injection system that any level of complexity or duplication added on top will be not worth your hassle. Its all fun now and intriguing while you are reading and theorizing what is best or what would be better... but when you practically run it and then live with it and then time passes and you have the same system for multiple years you then think gee I wish this had less things to go wrong or to keep on top of.
Something with just one solenoid, one filter, one tank, one set up will be much easier on your brain and do most anything you could ever want.
Don't let me talk you out of it though
just trying to give you so "in hindsight" type advise