Ed,
Does the printer you have accept rolls? If not the explaination below is the reason to have one.
I would love sheets for everything too but print off of rolls for 95% of my printing.
I carry 1 size sheet 8 1/2" x 11" for about a dozen different papers and then go straight to 17" and 24" rolls for everything above that.
From 17" rolls you can get any size from 11x14,11x17,12x18,13x19,17x22,17x25 and everthing in between. 17" rolls and a good cutter and you now offer a dozen different sizes from 1 roll.
It really is different strokes for different folks in this business as you may print one or two sizes and I do 20. So the roll thing may not be up your alley.