Multitasker here as well. Been working on T206 and W512. Down to needing 1 for the W512 and around 40 T206s. I briefly started a 34 Goudey set, but quickly lost interest about 10-15 cards into it. Along the way I've also picked up a couple of Old Judges, T210 Series 2, Obak and T213s when I've come across good deals thinking perhaps one day I'll take a stronger interest in them.
With my W512 set nearly complete, I'm trying to decide whether or not to soley focus on T206 given the last 40 or cards I need contain a lot of the expensive ones (Cobb, Johnson, Young, O'Hara, Demmit, etc) or start on something else at the same time.
If I listen to my wife, I'd focus on saving up for a bigger home or selling my cards as a downpayment. My argument is if we had a bigger home, it would be more expensive to maintain, thus giving me a much reduced card buying budget. I've found a quick trip to Tiffany or Gucci gets her mind off this for at least a few months.