You've been working on that for a long time. Have you considered working on the actual code to bootstrap Tau first, and come back to this later?

I know that when building something as complex as a new language, and pieces have to work together, but once you have the code that the Tau engine will compile, it will be a lot easier to create an efficient compiler, "A plan never survives first contact with the enemy", "Make it work, make it right, make it fast" and all that...

Also, having something to show, as slow and imperfect as it may be, would do well for getting the message out and help you raise funds. This as well as the effect on the community and helping draw smart people to be involved in the product, which I would expect to be invaluable...