As Leo and ed said, its not about how much money you spend, its what you use and how you use it that matters. Storm 2 is only so expensive because of all the parts that have been made by people other than team storm. 1 inch of expensive titanium costing thousands isnt any better in this situation where spinners arent allowed than 3-4mm steel costing nothing.
If you dont want to build a robot yourself you have to be prepared to spend ALOT of money for something that most people could build for free.