I have a small POS network consisting of 2 medium Gallenti towers and 3 small Amarr towers., right now my Towers are set up moon harvesting, The minerals they bring in sometimes barly cover the fuel cost, I am thinking of investing in some reactors and doing basic reactions, I am also aware that Labs can produce a significant income. Those of you who have experience running POS networks, what types of set ups can some one run to produce isk? which operations would be more successfull isk wise? I also own several small t1 ammo and cruzor BPO. I have so far invested about 3 bil in POS towers and epuipment and I have seen very little return. I have about another 2 bil budgeted to "renovate" the way I am operating my POS network. Any help you guys could offer would be appreciated.
I don't know the specifics of your situation like which materials the moons you harvest provide, which markets you have access to etc, but consider the option of scaling down. forcing yourself to make use of all the 5 POS may turn a profitable business with 2 towers into a failing one. An additional POS uses additional resources. Not only ISK, but also time. Therefore evaluate if they add more value than the resources they suck.
If you cannot make a meaningful value chain with all of your POS, just decommission (and even sell) some.