Low cost and small run doesn't generally exist in tshirt printing.
First thing, how many colours would the design be?
Second thing, how many are we talking?
Third thing, can you give me any idea of the artwork as that effect how it can be done.
Realistically you have 2 options on a short run (without it costing a fortune); heat press vinyl, your artwork would have to be really simple and the colours would be a complication or DTG printing, more expensive but limitations in terms of artwork are almost non existent.
And I know a great place for DTG printing and I think Ken knows someone who knows a thing or 2 about heat pressing.
Simple questions simply breed answers BBOL