yeah i dont think a miter or a band saw are going to be much use in this project... the ones your gonna need are table saw and a router those two will do about 98% of what you need to cut... then again that depends on your design.
as for the ply wood you wouldnt want to leave any of it bare. the whole unit needes to be sealed with a polyurethane of some kind. but if you like stain then you would stain it first then coat it with polyurethane.
if you dont feel comfortable putting bedding down on a polyurethane there are other things you can do as well. the two ideas that i like best are vinyl flooring, and bar top epoxy.
once your unit is all built and finished (stained and polyurethaned)you can go to Hdepot or Lowes and get scraps or a damaged roll of vinyl flooring and glue that right onto the floor of the cage, and silicone the edges. you might even run a 2" or 3" strip around the walls to help for cleaning. doing this will make it more durible and easy to clean, plus you can put your bedding down on top of that
the bar top epoxy would have to be mixed and poured into the cage in stages, i havent done this myself but it doesnt look to hard and you can get plenty of info about how it works in the caging and habitat forum. and same thing this is waterproof easy to clean and wicked durible.
i am in the process of working out caging plans myself only dont care for the staining and sealing process, so im going to use maple melamine, and build 5 stackable cages, three of them will have dividers so a stack of 5 will turn into 8 cages total...
how big of a unit are you thinking about. how many cages and how big? that will help in designing it, and also do you have any thoughts on heating? thats good to know for planning also
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-Stephen-
0.1 soon to be wifey (hopefully)
1.0 rotwiler/chow (Boomer-wifey's pooch)
1.0 norm corn (Jake aka grumpy old terdhead)
0.1 col redtail boa (Dixie-my baby girl)
0.1 ball python (Bella- wifey's baby girl)
hopeful for not to distant future:
--brazillian rainbow boas 1 female for sure
2 or 3? maybe a breeding pair?
-- bearded dragon for the wifey my list got to big...
more distant future hopefuls
1 or 2 of each maybe a breeding pair?
--anery boa (ooooh)
--jungle carpet python (love to have 1 or 2)
--dumeril boa (ahhhh)
slightly more wishful thinking
--hypo br rainbow boa (love em)
--anery br rainbow boa (oooh even better!!)
--motely boa (gorgeous!!)