Assume it was 1-click and 100% automated to deploy, run and update a Hub.

How much per month would you be willing to pay to run one? 

No direct economic incentive other than you know you're supporting Farcaster decentralization and you have your own copy of the network.

OK, if you're answer is you wouldn't run one.

Working on Farcaster and Warpcast. Longer thoughts at https://dwr.email

Most ppl who are willing to pay are probably all US/male/dev or a similar profile . To get beyond this group i'd consider creating a prestige community of ppl running hubs, with unique perks, early access to projects building on FC, and probably...keep some hopium of speculation about incentives...