Aloha,
I decided to use option 3 which was not even shown further up.

Vollmer Steinkunst red brick wall.
This material is made of Quarz sand, is semi flexible and quite strong.
Make sure you have a good supply of cutter knife blades when working with this material
as after every single cut the blade is blunt. As in visibly rounded in front.
Edges also tend to break out a bit.
But it does look very realistic.

Now I need to get more as I was planning to use this some where else.
Steps not finished yet, but I think you get the idea.
First photo just placing the full sheet to get an idea.