OMG. First off, take a deep breath. Repeat after me, "I WILL NOT KILL HIM (yet)."
My husband is like this too, if it helps at all. We've been looking for a new house for a year, in a place where rentals are snapped up like hot cakes, and he has ZERO sense of urgency. I've been asking for a discussion on our financials for ages, "oh, I have to update the spreadsheets, I have to do this, I have to wait for a blue moon, etc..." FINALLY got an offer in on a place and it's when do you NEED the passport copy (last Friday), well you only asked this morning (for the 4th time).
I get you. I don't really have any advice except to not kill him, if you can manage.