You have shared a very detailed analysis! It is also interesting to see how the licence balances out the production losses.
The new license (bought Aug 25) would provide 24.16 SPS or 215.97 DEC per day. I take this and stake back to my regions. All my plots had 100% required staked DEC for the cards PP on them producing prior to purchase. I added all the Net numbers from my regions which showed I netting 364 DEC per day from production. I removed 40% of the Staked DEC to fund the license. I was producing 129.5 DEC per day afterwards. I had noticed the net production swinged widely based on the price of grain vs the other resources prior to purchase so knew the calculation would not be a static number. Even though this would be a temporary loss of 20 DEC per day as calculated on that specific day, it would be reduced with every passing day as I re-staked DEC. Since it was so small I was not that worried about 20 DEC per day. Then the resource price ratios changed drastically dropping two of my regions into net losses.
Lesson learned. I still like the idea of using the lower APR assets to fund larger asset purchases with greater APRs however next time I probably will not bring the staked % down as low. I also probably overlooked lots of other assumptions that I should have taken into consideration.