It's hard to tell how much space you have, but what a lot of us like to do is make a L-shape with the sewing desk on the long end of the L and the ironing board on the short end. Since most people stand up to cut long strips, you could put the cutting table a short distance away. I keep my long rulers on a pegboard near the cutting table, but the small ones (with a small rotating mat) at my ironing table for when I'm trimming blocks. (My ironing table doubles as a nightstand and has 2 shelves. I sit to iron and use a swivel office chair at my sewing machine.) It's okay to get up to walk to the cutting table or else I'd get stiff sitting for too long.
Your room will certainly evolve as you figure out what works and doesn't work.
Hope that's been a little bit helpful.