More a what I would like to build, seeking advice

So I would like to make a very crude skid steered three wheeled strimmer/weed whacker (whatever your part of the world calls them) Something that can very roughly cover ground and just keep it down. Not tennis court standard. I particularly want it to keep knocking down the areas of brambles that I have until they give up.

Any thoughts on what I should buy, I have the autopilot and RC

Like this but bigger

Oh I should have searched harder

Am I the slowest person on the planet, flipping young folks.

Yes I am just dropping reference videos in here for myself