I'm not sure about prices in USA but here is a list of basic requirements:
* Vivarium, large enough for your snake
* Correct Bedding for snake
* Heating device (undertank heaters or heating cables work best)
* Temperature control device
* Thermometer
* At least two hides
* Water dish
* A good stock of the correct size prey for the snake if possible.
and LASTLY,
The snake.