Hey Jay-R,
Second-hand computers work just great for me. I have a laptop, and desktop that is my main machine, and I have bought 2 another that are second hand but they do just great with 3 MetaTrader platforms installed on each. So on those, I have my 6 Demo accounts, and on my Laptop and main machine, I have the 2 live accounts.
It is a bit of investment but if you pay VPS every month, you will end up with more cost at the end of the 1st year probably.
Cheers,