eGpu Vray setup

Hi guys,
i am running an macbook pro 2019 15" with maxed out techstats. The problem is that I got the AMD Radeon Vega but because of incompatibility, i can´t render with vray that fast. Right now i am thinking of boosting my renderpower with an egpu with a very good graphics card, while having the option to carry the egpu to my working space and back home. But i am wondering which egpu unit is the best to get the maximum power. Are there any recommandations for a graphicscard and parts i need and does it work with bootcamp?
best regards

I have no idea, but would ask also here:

And at the GPU section I read a post about eGPU. Sounds good. I would try to get the max power per RTX3090.