Do you need the VPS for the computing power to run more instances at the same time for testing different strategies? Would a more powerful & faster computer solve the problem or would you also need a better internet connection?

I remember the manual saying a fancier computer is necessary for testing a number of strategies at the same time.

Here's one that looks powerful & fast to me for cheap ( I don't know a lot about computers)

Anyway it has an 8 core processor and is under $400. The 6 core one is about $250. Maybe that would be better than the VPS?

http://www.tigerdirect.com/applications/SearchTools/item-details.asp?EdpNo=8148341&CatId=7718

I think the Intel i7 is only a 4 core.