Try Harbor Freight or Homier Tools. Both are easy to locate on
the web. HF has retail stores, mail order, and Internet ordering.
Homier has mobile tools sales plus Internet ordering.
Both sell economical SDS drills and economical drill bits.
Homier sells an SDS drill for $19.99 which cuts 1" holes through
concrete. I suppose its bearings might start to give out after
you've drilled a thousand 1" holes. Until then, it is a great
I've got the cheap Homier drill plus a somewhat more expensive
H.F. drill (About $65), and a lot of H.F. SDS bits. I'm very happy
with all of those purchases.
These SDS drills are somewhat massive compared to your "standard"
homeowner's 1/2" hammer drill. We don't really know what your
definition of "massive" is.
If you already own a hammer drill and a variety of bits, then I'd
feel fairly confident that you could work your way up starting with
very small diameter concrete bits. Once again, we don't know how
many holes you want to drill and how patient you are.