Can i apply for local tax registration like VAT renting a Virtual office in Karnataka?

We would like to know few things about applying for VAT/ TIN registration in Karnataka.
1. Can i apply for vat/ tin number renting a virtual office?
2. If yes which will the cheapest way to get virtual office?
3. If virtual office cannot be used for the purpose of tax registration, then where can i find cheapest office space for rent in Bangalore or Manglore. My budget would be not more than 4000/- and we would hardly be using the space.