...Okay. I can work with that. (And I hope the rest of you feel free to jump in for some aid another action.)
Besides the fact that Kingmaker is made of awesome, I believe there are a number of things that should make it relatively easy to prepare and run. The first is that the encounter zones are fairly simple, discrete affairs, which for the most part can be run in the theatre of the mind just fine. Set piece encounters all have maps. So there is not a whole lot of, "And which room is Ted going into? What exactly is he doing?" Everybody is basically in sight of the other party members at all times.
Second, it is not like the adventures, at least the first two, are really dialogue heavy. Most of the conversations are going to be intra-party, and will not require intervention from you. So there is not really a lot of intracacy that you need to keep track of.
Really, a lot of the grunt work can be handled by either the party leader or the "party clerk" just fine: keeping the map updated, the list of loot in good order, and that sort of thing. In fact, I could even suggest that one or several of us players handle recruitment and putting the party together, assuming we have not already had enough people show interest already. So basically everything would be ready to go for you to just jump in at the beginning. The only thing you would need to decide is how many players you want in the game, and the rest we could come up with a fair way to take care of ourselves.
I hope those are the sort of reasons you were looking for. You said that you had a lot on your plate, so it seems to me that keeping your side of things as light and easy as possible are going to be the relevant ones. In any case, I appreciate the opportunity to convince you.