The furniture models on the server look great and I agree that it would be amazing if players were able to use these items in their housing. Although, as you suggested, these furniture items might have been applied using armor stands or something along those lines that players might not be able to use right now.
An additional suggestion if players can't use armor stands or the furniture models -
If players won't be able to use the furniture models because it requires armor stands or another system, then what if there was a sort of interior design shop where staff who are Builders/Architects can apply the furniture inside a player's housing? It would cost a good amount of gold such as 5000g for one room that includes 3D models of the bed, one of the sofa models, and maybe an armor stand with school robes on it.