Job Management application

I am looking for someone to build a job management system simialr to : [[login to view URL]][1] Basically i require the application to have the following components: Client Databases Job Management: Entering in Jobs and managing their status Products: Attaching products to a job and managing their inventory Billing Module: Invoicing, reciepting of payments Scheduling Messaging Help Prompts: explain via popups what certain function do Mobile Interface: A interface that can view jobs on a mobile device. (browser interface) Options section: Exports User Management: here is an example of what im after: <[login to view URL]> login: admin pass: pass When a job is dispatched to a field worker then it is viewable from their mobile interface: <[login to view URL]> Login: mobile I require this application to be built as a SaaS so that users can sign up online and it will create a version for them. I'll require the coder to provide ongoing support and updates once the application is running live.