I hear you I hate this hot humid weather, its not for me!
I know the odds of this working are again slim
BUt, if you can find some kids,and, try a bribe of sorts
giving a TOP prize to who ever build the largest pile of rocks, wins the pot or the likes
never know what help you can get.
I get some jobs done at my place when i sisters kids are here(spoiled kids) and only way I can get them to do anything is when I can pit them against each other and offer a prize to the winner
seems to help motivate kids other wise wouldn't lift a twig on there own if you asked for help!
Maybe even offer a hunt to some older teens or young adults ? once the plots get built? who know's this can even lead to a good friendship ??
archery ranges/shops/gun stores are decent places to find some help too
lot of folks don;t have any place decent to hunt, and many will do work for access, and you get to PICK and choose IF you like them, based on how they work or NOT!
Again, some times help can be had if you get creative!
and I still think a tracked skid steer with a rock bucket would do wonders for you, , and save your back a lot of work, and up my way 90% of them are AC cab'd to boot LOL
worth a few extra bucks right there to me! HAHA!