I think you are living in a situation that would drive me nuts too.
However perhaps you are looking at it from the wrong angle. Perhaps your husband isn't a bad egg. Perhaps he is not procrastinating. Perhaps he has just bitten off more than he can chew and or been levied with unrealistic expectations.
If he is working then expecting him to do renovations at the same time would be very unfair. He needs to be able to have a life as well (eg quality family time). If he is not working (as I read your post could be wrong?) then it sounds like he's still got a lot on his plate and I don't think forcing him to renovate a house when that's not what he wants to do is fair.
Perhaps you need to take more of an active role in this situation. I don't mean to be rude but mentioning that your hubby procrastinated with having a vascectomy and that's why you have 3 kids is a little unfair and dodging responsibility. It takes 2 to Tango.
With regards to the house either finish it yourself or hire someone to do it.