My stokes are on a diet of minced meat, fruit/veg, and insects but I haven't had them too long so I'll need to experiment a bit more with other foods. A 4ft enclosure should comfortably house 3 or 4, I don't know actual temps but the basking spot is nice and hot and the cage has a temperature gradient so they can escape to the cooler end if they want.
I haven't had mine all that long so I'm still learning as I go but that gives you a general idea.