Becca, I'm sorry about the 'coon attack! If you want a cheap way to protect them outside, maybe try carpet tape around the plants (double sided tape), and there are some plastic-type spikes that you can get at the garden store that deter cats that you might be able to place around the plants too.
Did you have a screen around your plants when they were chillin' outside?
As for the temp drop, have you tried keeping them near an air conditioner? I've heard some people have good success with this, and/or by a partially opened window at night...covering the area around them with plastic to make a mini greenhouse to TRY to avoid heat loss in the house.
Or, you could just invest in another orchidarium.
Sorry this is so long! Keep us posted on what happens!