I can help you with the basic setup of xero. I will also provide training on the workings of Xero. I do development on Xero and help many people on a daily basis on the forums. Have a look at my profile https://profiles.xero.com/people/henzardkruger. I have a lot of experience as I am using Xero for my own business and training accountants to use Xero. I however am not an accountant but a developer. I specialise in integrations between systems like linking your POS to Xero or CRM to Xero. Have have done many solutions including Payment gateways. We do all kinds of applications from small to large enterprise systems. From desktop to web in any programing language.