Had an idea how to proceed towards my/our goal of 3bn/month profit on the towers

Basically, technetium is expensive.
Therefore the big thing is making money to buy tech while keeping enough profit to fund pew pew.
So the basic outline is:
1. Setup a large gal tower with 1 complex+simple reaction.
2. Buy ONE! week of tech (about 670m isk

)
3. React it all to the complex (fullerides or something like that)
4. after one week sell one weeks worth of complex stuff and keep running without the simple reaction (one week of simple reaction will yield results for 2 weeks complex)
5. profit??
Well anyways, the gal tower will produce cash to expand tech supply slowly but surely, it will also be possible to dedicate that to the expansion while the other towers churn out a steady supply of isk for immidiate use

It is a bit more work, but not significantly so really, biggest thing is hauling 4 times a month to jita with goo rather than once. Still have to check in on the towers to move the complex out ever 5 days or so iirc.
The biggest advantage is that we need a lot lower startup compared to setting up the complete chain including 1 month of tech for it. All in all I estimate the startup cost will be about 1.5bn.