Since I found a good level spot to drop the BH, and some blocks to stand it on, I can remove the BH in about 3 minutes, or put it on in about 5.
Putting the 3ph arms back on or taking them off takes a few minutes too (the pins for the 3ph stabilizer arms are in a really snug spot and occasionally give me trouble depending on which direction the hairpin is facing).
Overall it's a pretty quick thing to do, and it definitely gets easier & quicker the more you do it.
I could afford another tractor, but I can't imagine getting one just so I can skip this step. I'll get another when we either need a really small one or a much bigger one... in addition to this one, of course
I suspect that tractors eventually become an N+1 item - you have N of them and you always seem to "need" (ie, want) N+1 of them - just like motorcycles