I play an old version of FM (2014). Primarily because at lower lg level (and I'm speaking of lv 9, 10, 11in that edition), a 48 year old striker called Simon Grayson was always available at the initial start of the game, he had incredible stats plus incredible consistency and important matches too. Basically a 50 goal a season god (plus 30 assists) if you played through the middle and played him in a 3 man attack with him as a central striker as a trequartista, he could literally carry your team almost undefeated for 2 seasons until he finally called it a day.
He would ordinarily call it a day after the 1st year (as FM is notorious for quickly retiring anyone over the age of 33/34), but, I realised that if I got him to sign a new contract at the start of May, that signing that new contract automatically negated him calling it a day around the middle of May after the 1st year (but nothing could be done to prevent him calling it a day after the 2nd).
But, the main reason for this post, is an incredible trick I discovered and I was wondering if it still works in the current version (or works at higher lg levels in older versions)
I realised that if I moved everyone out of my reserves, the game would give me 17 greyed out players. Giving contracts to all of them around the 20th May only gave them non contract contracts. But, around a week or so later when the game always decides the new season's wage budget, it thus give me a vastly higher budget than I would have normally had, and I could then simply release them on a free and use that budget to either sign players who would normally ask for higher wages, or part use it give me a transfer budget. And yes, this trick worked again and again if you seriously abused it and immediately shifted out all the 17 now non contracted players to get 17 more greys who you could offer contracts to (although in the interests of fairness I would only use this trick once a season).