(CA) Should new investors get new bank account & phone number?

This question is kind of related to the other one from earlier today, but I wanted some information specific to California (very tenant friendly, high taxes, LLCs cost hundreds a year...). I'm in the process of buying a multi-family, and I'm using FHA. I want to be smart with my money while starting out since I don't know how long it will take to get tenants (how long should it take?) Should I get a separate bank account for the other units, even though the loan is in my name? Should I get a new "business" phone for this purpose, even though I don't have a business?