Yes, this would be very helpful for the construction trades. Jobber its something we call change order / job add ons. for our sake because im in the hvac field i will use an air conditioner for example below
Job #100 approve for $5000.00 flat rate to install a complete central air system inside this new home thats being build. the agreement was to install was to install the condenser 2ft away from the wall but now the owners wants us to install it 20ft away from the wall from the original spot.
Client now comes and explain they now wants to install the condenser 20ft away from the wall, this where change order comes into play.
We would like to go back to job #100 and send the client a new quote which could be sub title like job #100a / #100b / #100c and or depending on how any change order is happening on the job before completion. The client now review and if approve it can be attach to job #100 as a subtitle under total cost so when it turns into the invoice, it wont be several invoices to send to the client all because the change order was made and approved from the job slide.
This would be great for construction company.
I hope i explain it good enough