I figured out a way to hack the Kairo Points.
Unfortunately, the negative method doesn't work, but here is what does work. For this method, you will need to start off with at least 5 Kairo Points. You can get some in the Dice building.
Once you are able to build the Kairo Shop, you'll notice that one of the items costs 6500. This is the one I used but you can use any value you want that can provide you the lowest search numbers. Scan for it (I ended up with about 500 values). Batch change them all to -10. This will make the item you searched for cost 5 points.
Buy as many as you can and save your game. Then batch change all the values to like 999999. Then go in and sell the items you just bought. You can repeat this as many times as you like.