It's not hard to figure this stuff out on your own.
Go to all the different botting sites, see what scripts are available and work well.
Estimate the GP/hour for each and how stable the profit will be.
Pick a VPS (look at the big ol VPS thread there) and see the price.
Then figure if the gp ($)/hr you can make running those scripts is > the cost of the VPS.
It will just take you a few minutes/hour to research it and figure it out on your own.
Honestly goldframing is lame and tedious and you're better off just getting a real job, you'll make a lot more money, faster, and consistently.
GoldFarming with bots is very tedious and time consuming I believe.
Taking care of multiple bots at once is no easy task I must say.
That's why it is of first importance to have a stable bot and script.
Remember NeXus?
As to op, i'd recommend buying a computer for goldfarming, because the'res no recurring payment, once bought, you'll only have to provide electricity.
There's a guide by KMJT here http://www.sythe.org/showthread.php?t=1265575.

