We use a few different sizes of clear Sterlites bought from our local WalMart store. Watch the lids though and add extra things if you need to make them escape proof. We bought a great little soldering wand from WalMart for around $10.00 that puts in airholes perfectly. We use aspen for our substrate.
We've found them great for keeping the heat and especially the humidity right. Very easy to adjust and light to move for cleaning, etc. The snakes seem to be doing just great in this type of housing.
We have the one big boa in a glass tank and it was way more challenging to set up and get it running right through the normal seasonal temp and humidity changes.
~~Jo~~