If possible, you might want to delay your BP's homecoming until you have the enclosure set up with proper temps and humidity, That's entirely doable by the weekend if you start now. Which is to say, get the tank, an undertank heater, screen lid, Acurite thermometer/hygrometer, thermostat (proportional is best at $100 or so, but a simple on/off for $25 or so is acceptable), substrate, water dish, two hides and four clips to secure the lid. With all that in hand, you should be able to dial it in within 4-5 days. So, if you go shopping on Monday and get all that, you should be good to go by the weekend. Assuming you have the tank, the rest should set you back about $100 at a pet store, maybe $75 if you purchase online.

But start early. Don't have bring the snake and supplies home at the same time.