The idea is that it would be fast and easy to setup and take down so that I could setup and take down every day I plan to use it and never leave it up overnight so as not to violate HOA with a permanent antenna.
i get that, however, unless your rules specifically state “permanent antenna” differentiating that from any temporary one is irrelevant. Most HOAs with which I am familiar make no such distinction regarding rules about permanence of antennas nor do they exempt nighttime from antenna limitations.
What do your rules state?
I agree with VSK. I've never seen any CC&R differentiation between permanent and temporary antennas. It's usually total prohibition or possible approval by the Architectural Committee. If the HOA happens to see your antenna when it's up, then you're at their interpretation of how to handle it.
If you're not going to ask for permission (if that's a spelled out option), then I'd recommend going stealth, such as attic installation. Or if you have privacy walls around your property like we do in AZ (6 feet), keep the antenna primarily below that. A 25 foot vertical would stick out like a sore thumb. A ground-mounted screwdriver would be less obtrusive, and effective under the right conditions. So would a tripod-mounted loop. As someone else mentioned, enclosing the Hustler in a PVC pipe disguising it as a flagpole is a good idea.
On another note, you mentioned a tiny backyard. Do you have room for radials, and sufficient room away from your house for a vertical? Lack of either one will severely impact the efficiency of a vertical. And with a 500W amp, you're inviting various RFI problems with any antenna.
Just my two cents. Good luck.
73, Bob K7JQ