For my one live eater, I get around 4 female mice at a time.

I purchased a very inexpensive and small cage for the mice (it was under $20). I also purchased a water bottle ($5) and some food ($5).

I like this set-up as I am able to flesh out the (usually) puny mice prior to feeding to my snake

I'm sorry to not answer the 'blunt force' part of your question since I am just not a proponent of that methodology. She could rig up a CO2 chamber and then freeze them....