Bush hogging 28 acres once per year

I couldn't find someone who is interested in hay, probably because the hay quality isn't that high.

I have a small tractor but my 28 acres have many steep areas and also some sink holes. Not safe for me really to do it.

Currently I hire someone to bush jog it once per year but I want a backup. I though about buying one of those Chinese RC Bush hogging machines. I'm handy and I can fix it when I break it. They seems tough and yes I will be carfeul and buy it from a trusted source.

I understand it may take much longer and that is fine.

Any thoughts?