Zkoppa gave you a great start!! It's fantastic that you are adopting, I know that your generosity will be repaid in love from your new pup.
The only advice I have echoes the others…. Crate train. Crates can be expensive, but you can look around at garage sales, Freecycle, (a yahoo group, go to yahoo, follow link to groups and search) and even 2nd hand stores. The crate will save your furniture, and sanity. Dogs love their crates, they become their safe den!!
There is a lot of conversation about food on this forum also, the best cost effective solution is to go to the local feed store. They have high quality dog food for less.
Good luck, post some pics!
Golden Breed's Zip It Up Osa CGC GSD
Abbey GSD rescue
Hurricane Harley CGC, Boxer Buddy
Chopper the Drama Queen CGC, Boxer NUT, ScH prospect
"My furs are not in storage, nor lying on the bed,
they're dancing 'round my feet, waiting to be fed."