I saw an awesome quote on some other site that went something like "Only winning players have a bankroll. Everyone else just has a training budget."
You, sir, have a training budget. Your challenge is to use it to best effect. I submit you are likely to lose your SnG most of the time, thereby restricting your "training" to one badly played game per month. This will not help you. Honestly, what I would do if I were you is either play for the smallest possible stakes, or for play money.
Either way, when you lose, figure out why. It's not bad beats, notif you're depositing month after month. I play on 2 sites. One I won a pair of freerolls
for $32 and am 10x that now. The other I did a min deposit and am closing on 10x. Why didn't I go busto? BRM. After thousands of tourneys and somewhere probably still under 100,000 hands, you can bet there have been downswings, but if you limit your risk -and- you are a winning player, your risk of going bust is low (mine hovers around 0.01%).
But first, you have to be a winning player.