Modern problems require modern solutions.
The problem statement
How does one evenly and without puckers or sags of loose spots, stretch 80 feet of 4 ft tall deer fencing so it can be stapled in place??? (Nobody likes a saggy/droopy and loose fence)
It takes an 8 foot long 2 x 4, LOTS of screws, the seat belt from that last row that nobody uses, a tow rope and an ATV.
The next (upper) 4 foot tall section of deer fencing will be even easier to erect and stretch.