Wanting to develop an online billing data base so businesses can raise invoices online and have auto responder follow up for quotes sent, invoices unpaid etc... must also be accomodate VAT, GST taxes etc and multiple currencies, Businesses can select their own invoice templates from the database and load their own information into it Postal addresses etc

Database is to be designed as a mini CRM also so business owners can send marketing material via email to client base.

Also needing an iphone app designed to log into the database via iphone to create contacts and invoicing and quotes

Invoice able to be paid via paypal or visa and automatic receipts generated after online payment

Similar programs include Jbilling and invoices2go

If someone can taylor Jbilling to our needs this too would be great