I'm unsure if the OP is talking about backtesting or live trading. Very different requirements.
A proper high memory VPS is something like $400-$1000 per month. For $1000 you can already build a very nice box for backtesting.
For live trading, VPS is an obvious choice always.
Www.speedytradingservers.com will give you your own dedicated server for much less than that.
