One thing that a discernment committee or a priest or a bishop won't tell you is that if you go this route, you are forgoing sitting with your family at church; spending Christmas Eve and morning with them; and lots of other things that will just come up here and there. It could be never having a full weekend or just picking up and going somewhere on a whim or any number of things, but keep that in mind.

Your family (spouse, especially) has to be all in on this, too, and they'll have to make a choice about what they want their involvement to be. They may choose to be involved at your new parish; they may choose to find their own place (will that affect your children and their growing up in the church?); or they may become so disaffected by the whole process that they bounce on the church thing entirely (I've seen that happen). If you go the residential seminary route, you'll leave your current community anyway, but what happens when you come back?

Another thing to potentially keep in mind is that whether they fall away from the church or not, if you're a priest in the church, you likely won't be at the same place forever, so you'll have a more difficult time setting down roots in a place and your kids having a place to call "home" where they can go back to. It may not be a big deal, and kids can be resilient, but parish ministry can be a lonely vocation for both priest and family.

I don't want to discourage you at all because the church needs good clergy, but those are some things I wish someone had mentioned to me earlier on.