If you use the method of joining blocks as in quilt as you go no need to put whole quilt order until the borders.
Methods is showing quilts done this way on angie quilts ,one lady manages and has very poor shoulders.
The big quilts are usually done in 4 sections, I did a wedding ring in 9 sections. You can put sashing to join or just join straight edges . Imusuallydo a quilt over seam just to keep in pattern.