Moving to Israel with teenagers is not recommended – unless the teenagers themselves are gung-ho and ready to go! One way to improve the chances of success is to visit as many times as possible before Aliya. Having both spouses on the same page is highly recommended as well!
The financial issue is huge – especially if you move to an area where there are people who are very well-off and there is pressure to “keep up with the Schvartz’s” (yes, that phenomenon exists in Israel too – less than in chu”l, but still there). People have had to be very creative in finding ways of making a living. On the other hand, if you’ve always wanted to start your own business, make your hobby into your job, etc… that’s what many do when they get to Israel.
I think Someone Who Cares’ reasons are ALL valid (tho I am not sure everyone who is reluctant t leave family/friends can be called immature!). On top of those I would add that one very good reason NOT to come to Israel is because it will magically make your life all better. Whatever issues you bring with you to Israel will remain with you, and be compounded by the normal Aliya issues. So do yourself a favor and sort out your marriage/troubled kids/financial problems (as much as possible)/in-law troubles/character disorders/halitosis and whathaveyou… BEFORE you get to the Holy Land. ‘Cuz, frankly, Israel has enough of those without you!