I go to www.rhek.com
here in NC. It's owned and operated by Ryan and one of the teachers is Fred_Jennings so assume for the sake of argument that I'm going to be offbase or flat out wrong for at least something I say and they'll need to step in and correct it which they're well capable to do.
Going from level to level is based on skill and I don't know of a minimum time neccessarily. On the other hand if you don't have the skill you don't have a chance is what I've been told.
There's gear with the "Krav Maga" logo on it and a lot of things we can get, but it's not a problem to use whatever you've got so long as it meets their standards of quality and safety for the activity you're working on. We have to wear a shirt from here to train though which is cool cause they've got some hilarious or thought provoking sayings on them. My problem is that I tend to laugh at the serious ones and get too deep into the ones meant to be a joke. I used to get beat up for things like that and it could happen again.
Sparring - I'll let Ryan or Fred answer that cause I haven't started yet and I'm not sure about in class. Outside of class times doesn't seem to be a problem.
Again, I have no idea how they would deal with you coming up. Gut feeling is that they'd take a good look at what you know and where you are and throw you in to the wolves.
I personally chose it because I wanted something that was focused on teaching me quickly how to handle myself on the streets if there's a confrontation. I'm almost 30 years old, I'm a preacher and I have a family. As part of what I do I normally live, work, and travel through bad neighborhoods. I've got six months to learn as much as I can. I have a background in more traditional martial arts, but I wanted something focused on street fighting instead of tradition or sports aspects although I respect those. Krav Maga's starting to get more well known here in the USA.
I'm working off the new schedule here so bear with me. This one's effective Monday actually.
Intro Class (To get people onboard and have them try things out) is 6:00pm-6:45pm Tuesday and Thursday
Level One is 9:00am-10:00am Tuesday and Thursday mornings and 6:45pm-7:45pm Tuesday and Thursday nights
Level Two is 10:00am-11:00am Tuesday and Thursday mornings and 6:30pm-7:30pm Monday and Wednesdy nights
Level Three is 7:30-8:30 Monday and Wednesday nights
There is a Krav Maga Open class on Saturdays at 9:30am-10:30am
I go to the two intro classes, all the level one classes morning and evenings, and I'm about to start sitting in on the level two classes in the mornings and on Monday nights so its roughly 9-10 hours of class a week.
RHEK has some very good MMA teachers, BJJ and Muay Thai; in addition to a very good set of kids programs. I'd love to take some of the grappling side of things, but I just don't have the time and a number of the classes overlap when they're held.
Good luck to you. Where are you planning on moving to up here?