i'm not exactly an experienced orchid grower (yet) but this one i do know... env. sci was two majors ago...
you can get agar at healthfood stores and just mix in a few things, not quite sure about the list but prolly like plant food and vitamins, and you can use mason jars for flasks and any random kitchen utensil that fits your purpose but the trick is keeping everything sterile. trust me, it's reeeeally hard but if you have a pressure cooker for the flasks, and use an aquarium on its side as a workspace and have a spray bottle full of bleach handy you should (theoretically) be able to manage...you'll prolly lose a few flasks along the way to contamination tho...
i would loooove to do this someday, it takes years tho (never stopped me before...) are you going to make your own seed or get it from somewhere?