For that kind of math between custom fields, I think you'd need a 3rd party add-on like the FormCalc SST for QuickBooks product (Google it), which is spreadsheet based. It could calculate the Ready Date, I think.

As for a daily report I'm not certain about how you'd need to go about getting that. You might need to prepare a standard QuickBooks report, export it to Excel, sort by Ready Date in Excel, then print out the spreadsheet.