My mother in law's garden has several varieties of those.
I refuse to keep one in my own garden as I have a very curious 2 year old who is still learning how to apply brakes when running.
She grows them as "desert succulents". So basically all the unfiltered sun they can get, and heavy drenching once a week in fast draining potting mix.
Western afternoon exposure would be easily handled by the Crown of Thorns.
Although a western exposure would provide enough light energy for cattleyas, it is also a very hot kind of light so you will need to manage shading and temperatures accordingly.
Even indoors, you can sunburn cattleyas in a western exposure. It is not the brightness of the light that is the issue, but the amount of heat energy hammering the plants at that angle.