Most VPS brokers provide free for traders (they will ask for the number of lots traded, or the amount in the account), all of them have about 1G RAM, it is very slow and the installation is not easy. It's easy, usually, to send a request to the broker's IT settings, from mt4 to the tools.
If you want to use free, try using Google, they give free range of $ 300, and if you choose any package, then every month google will deduct that amount in the $ 300 bonus given. Although google vps does not work well, or restart, but it is better to use the broker provided free.