If you can't fit a full-sized 80 meter dipole antenna on your property, please consider this linear-loaded dipole design from Callum ("DXCommander"- M0MCX).
The antenna performs well, considering the reduced size of each element.
If you can't see the video, please insert this title URL into your browser search box: https://www.youtube.com/watch?v=zWFU-VWOSJI.
Here are some comments from Callum (M0MCX):