Okie...I see...Maybe U should first decide 1.what type of instrument to buy. 2. What kind of case/outfit to use. 3. Read up on maintenance 4. read up on posture and related pains problem. 5. Learn to rosin a new bow with a new rosin 6. Learn how to hold the bow, sit correctly, and leave the rest to a teacher.
Pls go to this website`s discussion board. BTW, they do sell pretty good quality but cost efficient instruments also.
http://www.stringworks.com/discussion/default.htm
They have a lot of threads/topics open for discussion. Or u can simply post a thread there. It`s pretty active there.