The general rule for BRM is max 5% for cash game buyins and 2-3% for SnGs and MTTs. Your BR is so small that you'll have to use this system or it will evaporate quickly. BRM is a relative concept. I could have 100 on carbon and play 100NL if i wanted. All i would have to do if i lost it all would be reload. If $27 is all you can deposit right now, you better use the BRM.

Others have mentioned staying away from turbos and super turbo sng mtt. This is the a necessity. The fast blinds remove the skill and ability to play a solid tag style.