The problem is that giant lawn games are EVERYWHERE now. You can quickly pick up what you need on Amazon, or at Bed Bath & Beyond, Bass Pro Shops, or from Facebook marketplace. Somewhere, there is someone who bought these for a party and is selling them because they were pricey and they'll never use them again.
Honestly, it's not worth the effort to try and sell them as a rental when you're only going to get $20 per game for them - anyone can buy that Connect Four set new for $80, and that's before they use their Bed Bath & Beyond coupon.
For me, it wasn't worth the hassle. I bought the games, but I can't police them all night and it's very likely that pieces will go missing after a few rentals. My kids are enjoying them though.