Type of pay (per project or time entry)

I would like to see a more integrated interface for the “type of pay” per project. Like if I added a new project there should be a drop-down box to change from flat fee to percentage or hourly or salary or even (other). I think it would help keep everything organized together with project files. ALSO SUGGESTING a screen tab or project folder tab that switches back and forth from invoices sent to payments received and have it centralized to that project folder/tab.

THANK YOU :)