I'm not making espresso, I don't need a controllable super fine grind that only a super high end grinder can deliver.
Well, it's not like other brew methods don't benefit from this as well. But my concern is no longer the grinder, but the coffee itself, and at what point it no longer matters, given your tight budget. You say you don't use "super high quality" coffee. Not sure what that means. "Good" coffee will have three attributes....good quality green beans to start (single varietal or blend)...it's roasted properly...and of course, being fresh.
Let's worry about the "fresh" part. If you are buying beans from your source that are fresh roasted (as in roasted within a week of purchasing), then I'd say it's worth getting whatever grinder you can get your hands on....freshly brewed, freshly grinded, freshly roasted beans will always taste better no matter the quality of the bean and roast or the grinder.
If you are buying "stale" beans, then it really doesn't matter so much....grinding a stale bean isn't really an improvement over just buying the already stale pre-ground....it's all stale.
Know what I mean?
My preferred method of brewing (besides espresso) is a simple pour-over directly into the cup. No need for a brewing machine at all....just a $2 plastic #2 cone and grind enough beans for each cup. It actually takes less time than waiting for a drip machine to brew a "pot", and having the second cup done this way tastes much better than using the stuff that's been sitting in the pot.