So I'm looking to go to either the White Plains expo or the Oaks, PA expo to pick up my first boa and some of the supplies. Parents agreed to pay for food if I buy the snake and supplies myself, but scraping up cash has proven more difficult than expected.

So far I have $85, with a minimum $95 on the way. I plan on getting the following at the show:
Heat pad (unless I can use a heat lamp instead? I have one of those lying around)
Thermostat
Digital thermometer
Screen lid (36"x12")
Either a normal or a het albino, no preference on sex.

Will the $180 I have guaranteed be enough, or should I start working harder to sell the stuff around my house? And is there anything else (aside from hides and bedding, which I have already) I should get?