well, if they last me through my mod and through my first build from scratch so that i know that i can do this whole guitar making thing, then i will buy the more expensive stuff, but as of now its a beginning hobby and i'm just trying to be minimalist on budget and the tools i'm using, so just getting the basics, and the router i may just go ahead and get the porter cable straight away if possible
The problem is that using bad tools makes it harder and less likely that you will succeed. I've bought a bunch of things from HF, but they're things like a heat gun and bar clamps. I've certainly gotten my money out of them, but I don't think there's a time I've used the bar clamps and not thought about the fact that I would have been happier if I bought better ones. I can only imagine how much vibration a RO sander from them would transfer into your arm and make sanding less enjoyable than it already is.
You also have to think about the fact that something like a sander isn't just to make a musical instrument. I owned a 1/4 sheet sander, RO sander, belt sander and a belt/disk stationary sander long before I ever thought about building a guitar.
And regarding weather or not you succeed, that's entirely up to you. Even if you make a complete mess of your first project, if you take your time, are patient, think things through and learn from your mistakes, you'll get better. It's about whether you want to do it, not if you can do it. If you want to, you will.