I am opening my own business, and have a need for a 2-4 line system, with an attachemnt for answering machine and fax. I will use cable or dsl for my pc hookup. I will be alone in the office with only part time help the first 2 months. Phone needs to roll to next line for 2nd or 3rd or 4th calls or fax if line 1 is busy. what do you all suggest as a good starter system that won't break the bank?