Aww she’s a cutie.
Regarding the crate, usual practice is that they wouldn’t have food/water in there. They’re supposed to go in there and sleep. Granted, you shouldn’t leave her in there all day while you’re at work without food and water and a litter box, but a few hours in the evenings is fine.
If you do want a larger crate, there are some dog crates that double as furniture. I’ve seen a few that are coffee tables / dog crates. For our kitten, we just had her in her carrier in a corner when she (or we) needed a few hours of timeout. We’d put a lightweight breathable blanket over the top to make it dark and cozy in there.
In any case, I applaud your commitment to making sure she ends up in a good home, whether it’s yours or another.
In my town they get blown into piles by the wind and end up clogging all the storm drains, so the town is pretty strict on clearing leaves from your yard.
I compost mine over the winter, and then I have fresh fertilizer for trees in the spring. But most people just have a dozen trash bags in their yard until garbage day. Too bad.