It’s all speculation right now as a vaulted network hasn’t been released yet. There are a lot of options presented in this very thread. Also do a search for “farming hardware” and you’ll get some results, some are outdated but may still apply. There are a lot of factors to consider for an “optimal dedicated setup” whereas if you are going to be a casual farmer (non-dedicated)) then I believe any old/new laptop (/and in the future mobile phones) will suffice. 