How many tires you will go thru depends on how hard you want to ride. With the playa surface being rather abrasive I have seen tires worn down within
a couple of hours (very aggressive riding) or if just doing speed runs without much scrubbing, can last for days.
I can easily set ya up with a set or two of some 480, 4-plys that I'll bring and let them go for $8 a piece.
Libre hardcore (bf\'s and standards) KBSS suspension front end
Pegasus buggy
PKD Combats 2.9,3.5,4.8(proto type),5,6.8,7.2,8.6,10.3,15.4
jojo rm+ 6,7,8
jojo et 2.5m
jojo rs 2.7,3.5
Ariea Raptor 2,3