Well, my original suggestion was to befriend a rancher... not an expert and can't speak as to exactly how widespread it is (or even if this was legal I guess), but anecdotally all it took was asking around a little. Nice spot on a hill, few people/critters already buried there, felt right, cost nothing. Two generations in and I'd like to be a third. If that's not widely accessible I wish it were, from this end I've never heard of a $7k human composting service and it sounds way crazier to me than just getting buried in a pasture