I have about 20 Rc vehicles right now, And 2 helicopters.
And a 190x100 Rc track in my side yard.
But the 2 Rock Crawlers i have get the most usage out of all of them..
It all depends on what you run for Motors and battery's for the run times.
My Axial has 4WS with high torque servos and and also dig units on both axles..Also
running a 65 turn brushed motor..With all the electronics on board with a 4000MAh NIMH battery i get about 30-40mins of run time..And what amperage rate you charge them at has alot to do with the run times and how many charges you will get out of the battery.
My other Crawler is a HPI Wheely King with a crawler conversion on it..Nothing really special about that one..But it does suprisingly well on the rocks..It has ALOT to do with your tires and what compound the are !!
And getting the battery over the front axle if you can, makes a big difference.