I work on pre-primed (acrylic, not oil primed) linen, Fredrix brand at this point. It's durable, flexible, with mild tooth. In comes in various lengths and you can cut it to any size you need. C'mon, it's the 21st century....why stretch canvas to prime? It's also convenient to roll up when it's dry, for shipping purposes. Yes, you can roll up paintings. (Took years to believe it, but true. Many museums roll and store their art.) Always remember to roll paintings image side out.
I use Galkyd & Gamsol for working with the paint. Took me a little time to get used to it since it has different properties than linseed oil & turpentine (nasty).
And next time, I think I will show more of the sketch process.
Thanks for the support everyone!