The District has supplies!?! 8O
I probably spend too much on my classroom but.... I learned about garage sales and thrift stores after my first year. I have a wonderful, growing library in my classroom. The library books probably cost me the most $$$. At garage sales and thrift stores I have come across books that have never had their bindings cracked...$10 books for 50 cents! Used fish tank & book shelves from a garage sales...I never hesitate to mention I am a teacher and in many cases...I get a better deal. I do buy a package of pencils every time I go to Costco. The only thing I get from the office is paper...and they complain about that. "Mr. D why do you need more paper?" asks the office clerk. "Because those little kids in my classroom keep writing all over them!" I always respond.
Don't be afraid to ask for donations from the community. I never ask for cash but rather I ask for something in particular. (i.e., tee shirts with a local shop's name on it for Christmas gifts, reams of colored paper and such.) Rejection doesn't feel too well but when you find a supplier...it feels great. (Of course a thank you letter and picture from the class always makes everyone feel good too!)
Getting supplies is like having a hobby...it's all in the hunt!
Good luck and next year at this time you'll be surprised at all the stuff you have accumulated!