Working as an Independnet CPR/First Aid Instructor

Hi, I have been an ED and Trauma nurse for a few years now. I started as a first responder when I was a teenager, then obtained my EMT. In addition to my current job, I was considering doing some independent work as a contractor. I realize that I can get a CPR and First Aid instructor certificate from the ARC or AHA. However, I don't really want to "work for" either organization. I know that OSHA requires employers to train their employees in first aid (with some exceptions), blood-borne pathogens (in some cases) and they recommend CPR. I was more interested in going to small farms and other industries to offer their employees CPR or first aid classes. I suppose I could buy my own "annie" and other materials. Does anyone have any information on this? Do you know if you can work through the AHA, yet be more independent? If I develop a first aid program that meets the OSHA standards, can I tell employers that my program would satisfy the standards? Any information or insight on this would be helpful. Thanks.