Re: choosing a beadboard/wainscoting height(h)...
No offense meant, but you really need to adopt the KISS principle, Keep It Simple, Silly. The go-lden mean doesn't apply in this case.
Typical wainscot height is 32" to 36", you can set the height at whatever suits your tastes, or decorating needs. There is no need to put any more thought into it than that.
As for why you can't type go-ld, it is because of being censored due to spammers, there are a number of words that are equally frustrating, such as scr-ape or on-line that are also caught.