Put an add in the local paper, hit some garaage sales, and start asking around. You would be surprised how many tanks are sitting in basements collecting dust. I bet you could find a used 55 or 75 locally that someone will almost give away. I got a 55 gallon with stand, lights, gravel, decor, filters for $50 bucks not too long ago. I then found a 75 for the same price...good luck!