Three season porch bare drywall 350 sq. feet

I need a primer coat and a finished color. Because of high humidity,
I plan on using an oil-based primer and tinted latex as the finish
coat.
I want a sand texture wall and usually add the dry texture plastic
particles to the primer and apply with a roller. I am thinking it
would be less of a mess to roll the primer on and then add the texture
to the latex finish coat. Any reasons why this would not work? thanks