That seems like a fair bargain, helsbels03. I'd take the chance of having to decorate if I were your husband, as much as I hate the task.
TBH, the children will probably be so excited that they're going on a plane, going on holiday, being with grandma etc that they won't fuss that their father's not with them for the first couple of days. And, as you've said, the rest of it isn't a problem, you'll be fine without him for those 2 or 3 days, it isn't a money issue so there's no need to stress, you have it sorted.
Sometimes, when it's important to you even though others just don't "get" what it means to you, and as long as the family is not going hungry/uncared for/hurt, it's ok to put something else first, as long as you don't do it all the time (and let's face it, Leicester City aren't going to give him that option, are they?
). It's not personal, it's not that he doesn't love you I'm sure, it's just that once in a while it's human to want to let the prospect of harmless euphoria take over. 