If I look at the market hashrate for S9 its coming down and S7 is going up. I have seen posts where people say there are getting more bitcoin from S7. From running it on the calculator as the maintenance costs are higher you will do worse with the S7. It looks like PACMiC is profitable, but it depends on how much profit they give you.

Anyway I think your cost was slightly more than what I calculated. So you pay $14 but make $12 after a year.