PM @privex on Steemit Chat for Steem Witness Server - https://steemit.chat/direct/privex

Prices are on this Post - https://steemit.com/introduceyourself/@privex/we-are-privex-inc-we-accept-steem-protecting-your-privacy-in-the-cloud

This post if you follow it step-by-step 100% works -
https://steemit.com/steem/@someguy123/your-guide-to-setting-up-a-witness-server-steem-in-a-box-hf19

Caveat, you must use the Privex server because you are pulling repos from his server. Or at least I assume as much. I haven't tried above from another server. I have installed Witness using a Linode.com recently but it takes FOREVER because you don't have a bootstrap of the blockchain and a $40 server from linode only gives you half as much juice as a Privex $50 in hard drive space in memory. AWS would be even more expensive. I highly recommend Privex on many fronts.