Yup, just not cost effective to breed mice for one corn.

On the other hand, you could buy bulk for the one corn. If he's full grown. Buy a bunch at a show (sooo much cheaper than petco) and just feed them off one by one until you run out. If you'd even prefer, buy bulk frozen.

Or co2 the live mice yourself and freeze them for later use. Save on the shipping.

Knowing how much it costs to raise feeders, I would advise you to save your money and use it for bulk purposes.

Just my .02 cents