Lift height and tire size depends on the Jeep model. In the JK/JL/JL lines 31-33" tires are stock sizes which require no lift but many go to this size lift for looks. The JL and JT Rubicon and Mojave can run 35's on the stock suspension just fine.
2-2.5" of lift is good for 35's. This is the typical lift height most JK/JL/JT owners go with as it's a good mix of looks, functionality and price.
3-4" of lift is for 37's. I run 3.25" of lift on a JK with 37's. It's a good combination and I can still get into my Jeep (I won't lie, it can be a struggle sometimes but I have short legs).
5" or more is extreme as you pointed out. 40"+ are what you will see for tire size.
I know the OP is trying to sell Chinese knock off power steps. They look like Amp Steps which are good for a mall crawler but useless off road. If you want rock crawler steps, get the Rockslide Engineering steps. These are designed for off road and have add on armor to protect them further.
I will say that they do show an electric hard roll up tonneau cover for the Gladiator that I would be really interested in if I can find someone who sells it and it's reasonably priced. Maybe they would offer one to me for review and beta testing.
