So far that's all I've used (though, this Fall, when I hope to hatch out 13 babies I will use shoebox sized Sterilte containers). All of my current snakes, when hatchlings, were started out in 10 gallon tanks and then were upgraded to larger cages when they got too big.
One thing that you may see it that your snake might not find it's food very well and you may need to use a small feeding chamber for the first few months.
Always put the heater outside the cage, so as to prevent electrical shocks (if a waterbowl tips, etc.)