As has been told to you,you dont need high salaried players in an all bot league.all you need is a decent group of players and maintain their GS.
Apart from that unless you are plannig to train a player,there is absolutly no need for a lvl 4 trainer, so fire him and stick to a level 1 trainer.
Plus if you are not looking to train a particular player, you don't need to focus on his potential, all that you need to consider are his skills, his age and salary.
As i am on my phone right now,i can't check out your roster. When i log in from my computer i will see to your roster.