Josh, Im building a robot similar to yours only it is 4WD instead of 2WD. Theres a pic of the current version on my profile but its in the process of being rebuilt. The armour will be twice as thick and will be more of a Tornado/KR2 clone with scoop. Unfortunately it will be a couple of weeks before I can upload any pics of the new one.
As for affording drills, Ewan has some cheap drills for sale @ http://www.gimsonrobotics.comGimsonRobotics