Hi all, just wondered if anyone could possibly show me a good tutorial on enabling and disabling objects, or help on here perhaps?

My idea is that I want to create a home but I don't want it available straightaway as I want to make it so I have to pay an NPC to build it in conversation etc. Basically like buying themes only id be buying the house an then possibly separate defences outside as well. Main goal is I want to disable the house/object and to make it appear I have to initiate conversation with the specific NPC and bring up a topic in conversation to pay certain amount of caps then the house appears.

Any help in this would be appreciated as I cannot find a tutorial for this specifically.