Looking for integration between Zoho CRM and an online payment option...

I have been using Zoho for a while now (soon to subscribe). I can't say "it's terrific" enough number of times!

We are an appliance service business.
I know that I can create invoices in the CRM but it would be so much better if the field technician could process the customer's credit card from right within ZohoCRM and the response from the third party (merchant gateway etc.) would then update some fields within Zoho CRM (with approval code for example). How complex is this to implement? I have been looking at PaySimple. They have extensive API documentation. I neither have the inclination nor the time to get down to the nitty gritty...

I am looking for someone who could take up this project. Anyone out there? :o)

Thanks,
Kenneth

P.S. Don't know if there's a specific place where this topic should have been more appropriately posted... please excuse otherwise.