Champion rental system

I'm sure everyone has had this happen to them at one time or another. You see a champion you might wanna play for whatever reason, you buy them and end up not liking them. There are 3 refunds available to you, but that is for the life of your account. I think instead riot should implement a champion rental system. This would allow them to still charge for champions the way they do, but also add an option for people to try out a champion while only spending a small portion of ip. Maybe they could do a 24 hr rental for like a few hundred ip or something. Just my thoughts, feel free to leave your opinion below