Or maybe... does somebody know where to get a big enough grinder (not large scale, just really big ) for home use, to be able to grind it myself fast???
Thanks.

You should be able to rent a leaf shredder from your local Home Depot or hardware store.

I take garbage bags and collect the stuff at the bottom that they prefer to throw away [ask permission]. Late Spring, after the farmers buy and after Holloween are the best times to get it free.

Or buy bales; chew it with the mower- make piles; raise the front of the mower and bring it down over the pile. Its a neater job with the bag on. Or do you have a place where it can be confined for bagless shredding?

I try to do this right after I mow, so I can throw the grass clippings on the pile, and do a mix and chop all at once.

I used to have the narrow strip along the cement-block wall planted, but once I discovered how useful it was for mowing mulch, I ripped out the plants & left it just as dry hard dirt.