I usually don't give advise unless requested. So here goes....
Money can buy a lot, but it can't buy you time.
If she never had you gone longer then a week, it going to be a culture shock to say the least. Granted your just going to Quatar, but your not there to fix the car when it breaks down, or help with the kids when she needs time to herself. uh 22 isn't all that old, and unless she is pretty independant and can handle all the house hold finances, the kids, and day to day chores all by herself for a year, well I can ensure you, you will be dealing with a freaked out wife on the phone after 3 months (been there, done it, and it will happen)
Like ViperTruck2933, I stayed gone for a bunch years. and this was prior to 9/11. (All over Central and South America, Former Yugoslavia, Africa, Korea, Panama, Desert Storm, and now Horn of Africa, Afghanistan, and Iraq)
After a couple of kids and 3 failed marriage, and a half dozen other failed relationships, my past and present team members are pretty much all the family I got now.
Now lets get what it does to your kids. Their attitude towards you will be not as a dad, but a guy that comes and goes, and you will no longer be the guy in charge. They will act up and become hard for her to handle because kids will learn what they can get away with, and know how to push her buttoms, which in turn she going to bitch at you on the phone because JR not doing what she told him to do, and it all your fail because your off playing around in some far off country.
Lost a lot of years with my children growing up, and now before I knew it, they were grown and gone, our relationship to this day is distance at best.
Oh, Have fun, Quatar it's a pretty neat country.