What is the load on your production server? If there is capacity you could always create a reporting db on the same instance and use SSIS to move data over on a daily (or more frequent) basis. That way you reduce licensing and hardware costs. If you get to the point that you need to move the reporting db to its own server, that is pretty easily done as you can just point the SSIS connections to a new server name (using configuration settings in SSIS makes this easy). I would also highly recommend that you actually create a reporting database architecture and not just report off of copies of your OLTP tables. You will want to design for fast read access and should build out dimensions like Date, Account, Person, Organization, Product. You'll want those when you need to create a report that shows monthly sales trends for all products by salesperson and you want every month and salesperson to show up on the report even if they didn't have sales.

Good luck,

MWise