Ok thanks, personally I was told that rental was also legal just don't know the procedure. Which is why I posed the question here. But I'll look into the legality of it more.
There's no such thing as rental license since it will breach the ToS of any licensing entity. Maybe you are pertaining to a temporary gambling license instead which you are allowed to operate within 30 to 60 days before they will require you to apply a full license. Whoever suggest you that there's a gambling license should provide a valid source to avoid being scammed by impersonator offering this kind of service.
Facts about temporary gambling license:
https://www.gamblingcontrol.org/regulation-framework/a-temporary-egambling-licence/