Wirecutter recently ran a post “The Best Gear to Outfit a Vacation Rental or an Airbnb” filled with excellent advice although does not take $$$ into consideration for hosts. For example, the Frontgate towels are wonderful but are hosts going to spend $40 per towel?
Wirecutter did not suggest anything for the outside space so here is a list of other Wirecutter posts applicable to the great outdoors. We are linking to the posts so that you have the latest version:
Wirecutter’s best smokeless fire pits
https://www.nytimes.com/wirecutter/lists/better-backyard-ideas/
https://www.nytimes.com/wirecutter/reviews/best-patio-umbrella-and-stand/
https://www.nytimes.com/wirecutter/reviews/best-smart-sprinkler-controller/
https://www.nytimes.com/wirecutter/reviews/best-smart-hose-timers/