The account should belong to whomever wants to handle the incoming funds, and disbursing them to other HHers who are doing troop support projects. And that's certainly not me.
I would say you have been making plenty of the big money purchases and should probably collect more than you have, but if you have had an arrangement already with Kimberly that is working, I would think it would be best to have her continue to collect the money (she can likely upgrade her account to this business account) and have her continue to put the packages together unless she wants to take a break and let someone else do it for awhile! I don't think ecurbh and I should set up the account and be unnecessary middle-men, and we are not the best shoppers for the job, we don't like going to town!