We assume that you are well aware of this lengthy discussion from Common Pond Q&A archives for great homemade structure ideas. Contact some local cement work contractors. They will have free concrete waste materials such as old sidewalk as excellent rip-rap and habitat along the shoreline.
Link explaining difference between STRUCTURE and COVER
https://forums.pondboss.com/ubbthreads.php?ubb=showflat&Number=92463#Post92463

Link showing lots of homemade cover.
https://forums.pondboss.com/ubbthreads.php?ubb=showflat&Number=92463&page=all

Last edited by Bill Cody; 12/16/20 08:26 PM.

aka Pond Doctor & Dr. Perca Read Pond Boss Magazine -
America's Journal of Pond Management