I’m going to be establishing an online business (LLC) in 2010 and would initially be running it from my apartment before moving into a house. Is this “okay” by Washington State standards or is it specific to the apartment complex/company? There would be zero clients/customers coming to the apartment as this will be strictly online.

I want to market my business and would like to know if there is a website where I can purchase email address listings.

I am renting 2 apartments while living in the house. I want to start a business in my garage and another one in my barn. Can I charge rent to both of my other businesses. Is there a write off? Should I have 2 other sole proprietors? I want to know the best way to maximize my potential.