When I stepped down from Eve University, one of the items I had on my list was to drop my own research POS. I had a number of BPO's that I bought in the past and used the 2Know POS to research them up a bit, so at least two battleship BPO's could immediately produce BPC's for sale. I read a number of the POS Guides that my fellow bloggers have produced and began my own checklist.
I looked at my standings to the Caldari State and thought that I'd be able to drop in Korsiki. What I didn't know then, was that the standings that count are not the skill adjusted (6.15 or so, as I recall), but the raw standings (5.88 at the time).
The thing that surprised me the most was how many inactive POS towers there are in space. Since they are still anchored, they can only be removed by their owner, but even in their inactive state, they prevent another POS from being dropped. In many systems that I surveyed, the majority of the moons were covered by inactive towers. Bummer...
But, at the end of the day, I found a spot where I could drop my small tower & 2 labs. I rolled a research alt and we've started cranking out BPC's to cover the fuel bill while researching a second set of BPO's up to an acceptable level so they can be copied, too.
I also discovered a great use for all those random loyalty points: charters. At 5 LP / charter these are a great value and, unlike many of the other LP redemptions, you don't have to add cash or other items to get what you want.
With all of the research copy slots full of my own work, I'm considering what to do with the invention slots. Renting them out would be an option, but I don't really want to let other people in to CACL, so they may sit idle for now.
The numbers indicate that I should recover my POS investment in about 2-3 months, but that's only because I already had BPO's ready to copy. If you are contemplating dropping your own POS for a similar use, be sure you include the cost of BPO's and the fuel cost for the time required to research them to a marketable level, along with the POS hardware cost in your isk needs. All of a sudden, that 200k-300k isk investment becomes 1.5B to 2.5B isk. And that, my friends, is a different kettle of fish! ;)