When you're making a house, see all the custom content you downloaded ? Because searching stuff is annoying ;o

You can package the house to a sims2pack and then open that in Clean Installer, but that may not get everything included (such as recolours of Maxis objects).

I'm not sure how to do it, but you can probably make a collection of objects and other CC you have. I always look in the collection to see the hotel stuff exclusively or any other particular style exclusively without thumbing through it all.