We would really Appreciate it if you could build out some functionality to generate invoices for jobs. Specifically:
* The ability to generate an invoice for a paid or unpaid service. For unpaid service, the ability to send invoice to client via email (in a format that clients could print, if desired) with a link by which the client can make payment online.
* The ability to generate a bill for a selection of services (e.g. customer gets weekly service, but wants a bill for the entire month sent on the 1st of every calendar month), with a breakdown of each service total (including service location, date of service, etc).
* The ability to pay service providers on jobs for which payment has not yet been received and mark it as such for record-keeping.