I strongly suggest that you don’t even think about it.
The one thing you need for scalping (apart from the skill set, which very few people have, outside financial institutions) is an ultra-fast connection, with very fast upload and download speeds, no latency issues, and so on. All exactly the opposite of what a VPS can ever realistically offer.
Beside which, scalping and retail forex trading are mutually exclusive activities, as explained here:-
What kind of “otherwise”? What would a VPS enable you to do that you can’t do without it?