Which ESC/MOTORS FOR A ROBOT!!

[nbcaznmaster]

my bro is building a robot for collage. he wants to use this esc http://www2.towerhobbies.com/cgi-bin...?&I=LXN643&P=0 and 2 of these motors http://www2.towerhobbies.com/cgi-bin...?&I=LX2426&P=0 for a robot. My bro wants to use the esc and have dual motors. I doubt its posible. They have a limited budget (schol is paying for it), and they have to put teh sale price. Cant buy used. Help my bro out. Find the cheapest setup. Not sure what the weight of teh robot will be, but i'll post it up eventually. it'll use a TANK SYTLE tires thing. So im not sure how that'll factor in with gearing. and sadly, for cash efficeeny, the system will have to be brushed...