I am going through the From the Ground Up PLO course taught by Emty. In the preflop section he uses monkersolver to show what hands should be folded/called/raised. I did some research and the software + pre-solved ranges seem really expensive. What would be a cheap way to develop a good preflop strategy, I don't really want to spend 100$ a month. I tried Odds Oracle, but it just gives equity on a single hand in relation to a specified, which is useful but I would have to check a lot of hands manually.