Ok, near the Arboretum...
Crestwood Suites are about 4 miles from it (going north). They're decent and their prices are good. (good area of town too) I know folks that have stayed there and they were happy with it.
If it doesn't appeal to you, look for the Arboretum area or the North West area of Austin to find something in your price range and with the things you're looking for, on one of the travel sites.
Your meeting place is about 8 miles from me, so meeting up with you shouldn't be a problem if you're interested.