@coolsport00 While I was working at the university, we used RDS on Windows servers with RTX GPus with good results. The T4 I believe required NVIDIA licensing.
You have a few options: 1) Upgrade your servers if possible, 2) Add more hosts and GPUS (the used equipment market is one option, if you want to risk unsupported equipment),
3) If the GPU is the limitation and not the host, consider upgrading to a 5000 or 6000 series GPU. oOr NVIDIA GPUs to leverage the RTX vWS and CUDA capabilities, the latter's support being particularly important for Revit, AutoCaD, and other high-end graphics apps. We used P4 and T4 GPUs at the time with success under XenServer and with the high-end NVIDIA licensing (which unfortunately requires, as I'm sure you know, a separate VM running the licensing server).
In any case, you are fortunate to be able to test this all out way ahead of before you have to go live.
