Mike, building a streamliner alone & with Fu(# all money will run you into burnout more times than you can count, I know mate, I am that soldier.
You just have to back off, gather up what's left of your sanity & go back in swinging for another round.
I moved out of the house & into the shop when I started building my big long pile of parts so I could get more done, that was 13yrs ago & I work on it virtually every day. It's been so long I see stuff that the "other" Sid built!
I'm in outback America but you're more like outback of the world down there so to me your achievements are even greater. Just pace yourself & try to see your accomplishments & successes rather than focusing on the mountains ahead. Remember Mate, one bite!
Sid.