you can run it on your home pc but you will be restricted by lots of things - bandwidth limits, internet speed, power of your PC, not to mention electricity consumption and your PC being taken up all the time.
You can get a VPS for so cheap, its definitely the wise option.
regarding amount of links you build, if you are using GSA at all to your money site, its not safe, you need to come to terms with the fact that it might get blacklisted by google and you have to drop it.
if your site is precious then you need to build some tiers and blast them with GSA.