If you're sending bids for the same job to multiple General Contractors, you can use Knowify's Copy Job feature in order to not have to rebuild the job for each GC you send the proposal to.
To do this, first, create the bid for one of the GCs. Then to create copies, go to the job's Summary page and select the Copy Job option:
In the copy job screen, you'll have the option to enter a different GC as the client:
Then when you save, you'll be able to have two identical proposals sent to two different GCs: