I have a storage problem here in the house...light now since a big chunk of my art is hanging in a show..but when it comes home, I anticipate some issues on where I will be able to hang everything.
Enter the flat substrates. I have two favorites that I like to work on specifically... Un-stretched canvas or illustration board. The canvas pads I purchase are NOT canvas paper... they are actual sheets of canvas that are primed and ready to go. I like these because they take my painting style without any problems. The sheets are the same as canvas, without stretcher bars.
The illustration board on the other hand, can pill..and it does not take a high level of lifting and scrubbing paint. But it is a nice surface to experiment on...it also takes collage well..so when I want to change things up, I reach for a board.
What's nice about both of these substrates is that they store flat! They ship for las money than a canvas..and I think it gives the purchaser a nice option to frame to suit once the painting arrives to it's final destination.