A unique situation

I need some advice. I am in the market for a new riding mower.

I have a little over 2 acres with some pretty good slopes.

Here is the twist? I can't use my feet for pedals due to several operations.

My biggest concern are the slopes. The best I can tell it would be safe to say it is about 17-20 degree slope.

I can spend about $4k.

Any help is appreciated.

Thanks

Phogan