Ways to Unequally Split Profits?

[Sean Imfeld]

So here's the deal: My mother (the money) and I would like to buy some properties together, with any rent profits distributed unequally to us both (let's say 90/10 in favor of my mother), with the understanding that this will change to more of a 50/50 split in a few years. I know LLCs may not be very necessary or useful when first starting out, but is there any other way to split profits unequally like we want? Can we just split them up ourselves without an LLC, or would that create tax issues? All discussions I've managed to find have focused on even profit splits.

Any help would be much appreciated.