I have had a "stealth" 20m beam installed on my house for about a year with no complaints (I'm in a CCR sub-division). I have the Cushcraft "The Director" MA5B up at about 18' tucked in by the rear of my house. The beam is just high enough to clear the roof edge as it rotates. I painted it flat black so it blends better with the roof shingles. It has the RS TV rotor to turn it. I painted the feed cable the same color as the house so you have to look hard to see them. From the street they are unnoticeable.
This weekend I just had a 20m QSO with ZK1JD in the South Cook Islands. I'm in central Florida and the beam was pointing NW, it should have been SW. I was pushing about 40 watts in a Yaesu FT-840. While I was weak, it was a solid contact.
The MA5B is the smallest 20-10m beam I could find and it doesn't cost a lot. Give it a try.
Glad to see hams are picking up on my suggestion to paint their antennas black to make them disappear and protect them from corrosion. The $.99 flat black spray paint from the big box stores is the cheapest and very effective. You can also see if you missed spot. You can't see that with clear coat.