What is Special Forces training like with a family?

You're not going to get specifics with an unverified account on an open forum. You will have field time, but you will also have a lot of time at home. It's very realistic to complete the course with a wife and kids, many people do.

1, You will have to take the SFAS and be selected- you will not have much time with your family. if any during that. Then you go to the Q course, same thing, then whatever secondary MOS they want you to have, same thing. If you pass all that, then world wide deployments sometimes 0 to damn little notice- its can be Hell on a family. That is why SOCOM has so many divorcees in it.

Like Marc said it’s realistic I did it but if your family doesn’t support your goals it’s not for you. Ensure all your affairs are in order (financially, family, etc) you’re trying to go to a place where no one will hold your hand so it’s on you to show you are fully capable of these things.