I went into nursing school in my mid 30's. I graduated last year at the age of 38. I chose nursing after having a 25 week preemie that died in the NICU after 7 months. I now work in the NICU myself. My time in the NICU as a parent is likely what landed me my job.
Can you handle school with 3 kids? It's a sacrifice, but if you AND your wife decide to make it a priority, then yes.
As far as making $60K as a new grad, that depends largely on where you live, and if you work days or nights.
I recommend an Associates degree from a community college. Then start working. Then do your RN-BSN at a university while you are working; there are a lot of online programs. The community college will be much less expensive than a university. Do not go to a trade school, you can only get an LPN there. You want to start with at least an RN, which an associates degree will get you.
My understanding is that to get into CRNA school, you have to have your BSN plus a year or two of ICU experience. I've heard that some CRNA schools will not allow you to work while you are in the program (not sure how they can do that, but it's what I've been told).
I don't think you need to be concerned about being a male nurse, there are a lot of you. We even have male nurses in the NICU.