Wow lol
Just to entertain the idea I'm not sure how a radar would benefit you unless you were at a very flat place that's sandy (or similar). Radar works by reflecting siganls off of objects. So in a wooded or even grassy area you'd have zero targets as your screen would be completely green.
Here's my current position. I'm at the crosshair
Notice the 2 objects at roughly 270° (left of the crosshair). That's 2 things sticking out of the water. The grass behind that is probably about 2' tall and you can see the radar paints a nice picture of it
Here's another target at roughly 330°. It's a small fishing boat that's close to the bank
See how the radar does not reflect off of the water since it's flat? Some kind of thermal imaging would probably be a better bet and a hell of a lot cheaper