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KeepBotting; btw
You'd be forced into safe mode with no gpu (so gf srl-6 (directx) and opengl scripts) + I'm pretty sure running rs3 in safemode for 8+ hours a day would get you kicked off of most cheap VPS plans for "cpu abuse" pretty quickly, so if you find one that looks good, make sure to have a look through their terms of service before buying it.
I'd personally recommend you focus your efforts on learning to script (e.g aim for srl member) before you get too involved in goldfarming beyond your home pc (I speak from experience), especially if you're going at it alone.