Are you kidding? No way. Breeding your own mice is only cost effective in certain situations for people with far more than one snake. Normally it works out best for those with 5-15 snakes. As any less and its not worth it, and any more its better to buy huge bulk.
For one snake I can't see it ever costing you more than 8-10 bucks a month to feed him. Just buy frozen.
bmm