My free companion, Bryantt, is of the builder caste and he is also Admin of Tancred's Landing. My kajirus was of builder caste before he became enslaved (sentenced to enslavement for trying to steal two slaves). Maverick and I made an auction block together for builder role play. It is scripted so that you work on it by sitting on a hammer or saw poseball. Thy are animated and have sounds, and you wear a hammer or saw it gives you. Over time, the auction block rezzes in different stages of completion, til in the end you have a completed auction block. You could use it to simulate building anything and just replace the auction block with your completed build.
Maverick also made an architect's table and board which are also animated. The architect examines a blueprint on the table, then turns to study the board, and then turns again to shout out directions (a series of linked animations for a total of 90 seconds of animation). He also made scaffolding, which I am not sure he put out for sale. You can always IM him in game to ask him about that, Maverick Schism.
I encourage content creators to make more things to assist builders in their role play. There are many kinds of builders. They would include the construction trades of course, but also inventors, scientists, technicians, engineers, repairmen, etc. We had wanted to do a role play around plans for a sewer system being stolen, which would have permitted enemies access to anywhere in the town through the sewer system. We never found anyone to be the villain who stole the plans though