I am trying to get away from the high hub cost. Most that buy the Acker hubs cost about $60 each so they have a cost of $120 to run 20 miners ( $6 per port).  I have about $8.50 x 3 hubs+ $30 PSU + $15 barrel connectors = $70.50 and am running 25 miners. Using cheap 10 port hubs, 5v 20a PSU I have my cost below $3 per port. This may not seem like a big deal until we all start to run 100 USB miners and a person having to find enough outlets to plug all those wall adaptors into.