Congrats, Mark and welcome. Your schedule doesn't leave much time for
building, but then again there is never enough time. You'll probably
spend a good deal of time absorbing the information from the plans
for a while but when you get started it's probably going to be best
if you take small bites and celebrate the little victories.

For example, I'd start with the alignment blocks for the jig. If I
had limited time like you, I'd do one or two blocks over the course
of a weekend and be happy with the progress. I'd keep going like that
until the blocks were done.

After that I'd start on the dropouts. Drilling/cutting them out one
day or weekend and filing/grinding on another.

In hindsight, I'd concentrate on the seat jig and seat last and cut
the seat width down quite a bit. You could even buy a seat as a
shortcut. I think Hostel Shoppe was having a clearance sale on some
hardshell seats recently. Buying parts and supplies counts as
progress even if it doesn't feel like you're doing much.

Good luck with your build!

Jim