My mentor said as I was buying POS modules and fuel from him that running a POS was a lot like tending a garden. You're always fiddling with things and setting them up and checking them and so forth and so on. I have to agree.
My "garden" is flourishing. The past couple weeks were dedicated to getting it setup and fueled and this week I'm entering the maintenance phase where I work out how to get the fuel I need regularly to the POS from empire space. I've arranged for a fuel contract from a corpmate for the Isotopes, but everything else is up for grabs.
If I get this working well for a month or two, I might consider upgrading to a medium control tower.