As someone who did 23 years active duty. I have no regrets and would do it again in an instant. AND it sure is nice being a member of the Check o the month club. aka retirement check.
I would go air force over the others. This equates to bullet catcher or a more safe wider field of career options. (nothing personal Army or marine guys)
I had a part time job most of the time I was active (I stood a firehouse type schedule-2days on 2off) Which means you can always do the lawn stuff on the side?
Which ever you do, as some one mentioned, you should be committed
other stuff neccesary to work
1 Desert Eagle