If a tree stand is possible use it and any caliber you would normally choose. At close range you’d be shooting at a sharp downward angle. Also, at close range it “should” take just one shot. BOOM - then silence - not like a fire fight breaking out. I wouldn’t think that would bother many neighbors - especially if they’re familiar with you and know that you may be hunting on your property at times.
For 11 years we lived on a small acreage (5-1/2 acres). We had 3 neighbors - all a half mile away. Although I didn’t hunt there (other than whacking the occasional coyote, crow or magpie), I had a safe backstop and did all of my load development and target practice at home. Not once in that 11 years did I hear a complaint.
Of course I had gotten to know my neighbors (all farmers - not acreage owners) and had permission to hunt on their land whenever I pleased.

What man, on his death bed, ever lamented, "God, I wish I had spent more time at the office."