Get one of those Dr.'s foster and smith pet magazines. They have many filters for things just like that. I know you probably have your mind set on doing this, but I highly recomend just kepig it simple, at leats till it eats very well, or even out of your hand. Most of my wyters will take fish very readily out of my hand. As weird as it may seem the water reaaly can do bad if it is 1.) not clean 2.) to much water 3.) or both. I would suggets putting the snake in a simple plastic (escape proof) box and wait till you get the filtration and any other problems fixed. But I know how it is when you have your mind set on something. If your like me you will stop at nothing till it is done.
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Justin