Players can have a release clause, etc.

If we have loans, ( I know the loans was someones else idea) the team could have an option to buy the player for ... credits, also buy-out clause alongside a release clause.
Maybe this is a better idea than my last one. lol

Thanks,
Waffles.

We have the option to release players already but buy out ?

A buyout clause or release clause refers to, in a contract, a clause that imposes on a football club wishing to acquire a player under contract to pay money, with the substantial bid of the clause money, to the original club to acquire said club's player.

That could lead to complications you can offer any club to buy a player even if not on market but players having a say wether to refuse a contract or not brings in option of agents ect too complicated to run

Loans will not work.
Buy out clauses opens up the transferring of credits, again, wont work