How can I offer financing/lease terms to my customers when I do not have the capital or credibility just yet?

Being that I am a recent start-up I do not have credibility or clout just yet. The equipment I sell can sometimes cost thousands of dollars. Without eliminating customers how can I offer them financing/ lease terms from my e-commerce retail business? What steps would I need to take?|||Go to a local bank or credit union to assit with this. Many small businesses that do have the capital and credibility do this so they don't have to manage being a creditor as well. It is smart business and most local banks/credit unions already have these lending programs in place...