What is the best way to raise start up capitol?

I have almost 20 years experience in tree work and handyman services. My personal credit is not bad but not the greatest. Since being on my own I have had to take smaller jobs I can handle myself or with minimal help. If I had the capitol to invest in some equipment and hiring reliable workers I know I could move my company up a couple of levels . But I can't get anyone to give me a business loan with marginal credit and no history of sustained revenue. Any help???