Rig and cost for moza R9 wheelbase and srp2 pedals

Hi, I currently have a logitech g920 with moza srp2 pedals on a playseat evolution and I want to upgrade my wheel and wheel base to a moza r9 bundle, however I feel like my current rig is no longer sturdy enough, what sort of rig do I have to buy and how much will it cost?