Are you sewing the blocks by hand or by machine?
The nice thing about making a cathedral quilt is you don't have to make a sandwich with batting and backing since it is already backed by the block process.
I've made two cathedral quilts over the years one by hand and one by machine. I prefer the hand sewn better....but everyone has their own way of doing things.
If using a machine:
By sewing blocks into rows and then sewing rows together in groups of three or four, you have less bulky weight.
Instead of rolling mine, I accordian pleat the length and hold it in my lap as I sew the rows together.
I position a table to my left and the ironing board opposite me at the sewing machine. This gives me a bigger area to help support the weight of the quilt. By sewing a small group 3 to 4 rows on at a time, there is only the bulk of that "group" under the machine.
If sewing by hand:
I sew the blocks into strips and then sew a strip on one at a time. Because I am right handed, I use a table beside my chair on the right side to hold the quilt. I hold enough of the quilt in my lap and sew from left to right as I join the row to the quilt.
I don't have photos of these two quilts because they were gifts years ago and we no longer live near each other. One is in Alaska and the other in Washington DC. That was before I started keeping photos of my handiwork...but they were really pretty if I do say so myself!!