I appreciate the offer but I already have other businesses that support Credit Cards, PayPal, SMS etc. I want this business to be 100% cash only.
lolwut? Obviously you don't want it to be cash only if you want people to process other payment methods for you, and you've said you already have other businesses that take other payment. This begs the question what are you trying to do? Why would you want someone to take credit card from someone and send you cash when you admit to already having the means and businesses established to accept more than cash. Why involve a third party?