I just spent 11mil completely renovating my rs3 house. Still a few odds and ends I need to finish up (Need a new porthole to rebuild diving suit, missing curtains and rugs in a few places, etc.), but I'm completely out of money so it'll have to wait. Regardless, my house has all the amenities you'd expect: gilded altar w/ adjacent portal room and nearby glory, mahogany eagle lectern, regular and ranged combat rooms, full kitchen and workshop, demon butler, opulent throne room, and a 6-room PvP dungeon with treasure! I didn't include it in the budget, but two of my clanmates contributed a magic stone each which allowed me to finally build a lesser magic cage.
We should totally organize a house party.