I can reply for clothes. Yellow is not a color easy to work, first. I made undie for my FW with yellow, and well, to have a beautiful tone, not too shiney, it was not very simple. I make robes of concealment, but I wear myself a builder insigna attached to my belt. And yes, not a lot of builders in SL Gor....
My character is builder caste, raised in this caste by her mother, a Turian lady and builder. First, I made Sasi scribe, with scribe mother, but when I worked on Turia's build, when I relooked the city, when I built myself some parts (the baths, the temple....), I decided to re-write a bit my background. The turian scribe mother became a builder.... Sasi developed her skills in architecture and design.
More recently, I built the big villa, in a roman style, of a Gorean man and I continued to develop my RL skills. But that I enjoy, is rather the design part. Give me a poor build, with some boxes called houses and bad aligned textures, and I transform all that, I retexture, I add embellishments and you won't recognize your buildings. As my taste is rather good, no disappointment.
But as well for Turia and this villa, I integrated this work in my background. Of course, IC, I designed the buildings and I directed their erection, managing the teams of workers, only, I didnt carry any brick myself
The other reason who decided my choice of caste, was the fact that I didnt like to fill notecards for slave papers, FC contracts, etc in RPing a scribe. And run a FC ceremony, I hated (or, in the very BTB way). Also too many scribes in Gor, mostly women.
Currently, I RP in a city where there is no need for a builder, and it's fun, I RP a lazy and spoiled FW, under the guardianship of a commander who wondesr how his lazy and useless ward will find a way to contribute for the service of the city, one day
My FW yearns only for a companion, children and comfort, now! (high rank companion, only, she will never FC a Torvi or a low caste man)
But I don't feel any obligation to build something for belonging to this caste, clearly.