I agree, probably not worth all the hassle for one snake, unless you need to feed live of course.
you can use 1.1 and keep all the babies, grow them on, use 2 to replace t parents,kill the rest and parents.. that will give you say 10 adults..
just do this every 2 months or so..
that will give you say 10 mice then for an 8 week period, should give you enough without over doing it. if you have any friends local who need mice, yu could always breed a little extra and sell them, that would pay for the costs of doing it too... not much work at all in just 2 or 3 cages.