You raise some good points. I had envisioned being able to bring pieces back and forth as I work on them. Seems like some of the early work, the panel, seats, etc are in bite-sizes that will fit in my car and can be worked on at home, while the bigger pieces are kept somewhere else.
So far, my wife is totally supportive of this idea. We have toyed with the idea of buying a Cirrus or Bonanza for a few years, but $500,000 to $800,000 for even a used 7 year old plane simply doesn't work in the budget. Building exactly what we want, fully-customized, for 1/4 to 1/3 the cost seems like the best option.
But a garage full of parts for a few years will quickly exhaust her patience with this.