Hello and thanks for trusting me to help you and your pet today. I am a licensed veterinarian with over 30 years of experience and would be happy work with you.
Simplicef is used to treat bacterial skin infections, but does nothing for the ear infections. Ear infections, even if bacteria are involved, need to be treated with topical ear medications, like ointments. There really are no over the counter ear medications to do that. As far as the skin, there is not an over the counter antibiotic alternative to treat her skin, but you may be able to help with a medicated shampoo. An antiseptic shampoo from the pet store can decrease the bacteria and yeast if they are present. I like the product called Hexedene® because it contains chlorhexidine which is effective on bacteria and yeast. There is also a "leave-on" product called Resi-chlor® with similar ingredients that can be used on the lesions themselves and in some cases, may be all that is needed.
If she is not getting relief, and you have to seek veterinary intervention, here is a link that may help to at least spread out the cost.
Care credit (veterinary): http://www.carecredit.com/vetmed/
I hope this is helpful. Please let me know if you have ANY other questions. My goal is to give you 100% satisfaction and if you are not yet satisfied, please reply so I can clarify for you.
My posted replies are for general education only and not meant as a diagnosis. Only after a thorough veterinary examination can a diagnosis for your pet be made and specific treatments be advised or medications be prescribed.