The good news is they can't spend much money while in bootcamp but there are a couple of things that you can do while they are away that will help them save some.
Car Insurance - if your recruit has a car and no one is going to be driving it while they are away. You can get "storage" insurance, which means you can basically drop all coverage except comprehensive. If they do not have a loan on the car, you could cancel the coverage completely according to our insurance agent. Our son's insurance now is only $25 per month - big difference! The insurance company can add the collision and liability coverage back on with a simple phone call when your sailor is ready to drive again.
Cell phones - I have found that this varies from carrier to carrier. We use AT & T (formerly Cingular) although our son's phone is on our family plan and the line itself only runs $10 per month between his texting package and taxes, it actually comes close to $25 per month for a phone that is just sitting on his desk!
I called AT & T and to suspend or put his phone on hold for a couple of months, they generously offered (BOO) to suspend service for a fee of just $10 per month! In essense we would pay the same cost for leaving the service on or suspending it. What a deal - right?!! In view of that, we left the service on but did remove the texting plan until he is able to return and that will cut the cost in half. We can add the text plan back with a simple phone call when he is ready for his phone.
I have heard that some of the other providers will allow you to suspend the coverage at no charge until they return.
Hope this helps!