Hey man
Have you thought about this? Record all your rhythm tracks, then burn them to a cd, then play the cd back to the tape on just one track, then record the last 3 tracks. Its not as good as having a ton of extra tracks, but, it works, and people do this kind of stuff and the results speak for themselves. In some ways it might even force you to make creative decisions based on necessity. You might want to bounce the tracks to cpu, then back to the reel to reel rather than use a cd burner, but its all up to what equipment you have.
By the way, dude, i did all the same things you are doing when i first got my reel to reel. Thinking that because i had a great artistic vision that recording would be easy. But, it turned out that no matter how great your songs are, recording is an art form of its own, and it takes a ton of patience and more and more experience to get the results you want. Fighting with the equipment is part of that, especially when you are just one guy. One of the hardest things for me at first was getting the sound of the reel turning and machine running out of the microphone. And also, seeing the VU meter on the record input from across the room etc. There were a ton of things at first that i had a hard time with, and because of my newness, just didnt understand. Im still terrible!
Just dont feel alone though, everyone feels that way at first. At least youve got the guts to try the analog method rather than instantly defaulting to digital like most new recordists do. You may end up running a hybrid setup eventually, and be trying to make the best of both worlds work for you.
And about band members crapping out... thats a problem as old as bands themselves. I bet when the first cavemen were beating on logs there were always a few that didnt show up cause they were too busy clubbin females to care.
Speaking of cavemen:
https://www.youtube.com/watch?v=VlRXQEA0yj0