Any business (especially small businesses, single proprietorships, partnerships) should build excellent PR with all their publics and stakeholders (i.e., customers / clients, stockholders, its own employees, the community where it does business, the media, government regulatory / supervisory agencies, civic organizations, even the churches, etc).

Eric Eggertson at http://www.commonsensepr.com/ can show you how.
One of the first institutions with whom you should build excellent PR is a bank. Don’t just set up a bank account. Get to know the manager and get to be known by the manager. Invite bank personnel to your office or production facility. Find out about birthdays and significant personal dates and send a card. Drop in to ask for financial / investment / business advice even if you do not really need it.
The main idea is to set up a relationship: cordial (even personal, if possible) and long term. This relationship will be a great help, especially during the business downturns when you need some slack in your cash flows.
Images from Microsoft Clipart
Building PR with banks? How feasible is that for home-based businesses? There is no production company or plant for home businesses.