I stopped taking residential real estate gigs a long time ago. But *occasionally* I'll take that kind of work if I have the time. For those jobs I always use my Mavic Pro. The thing is so small and diminutive that people hardly notice it.
There are other things I do...
For one, I always wear a dork vest (safety vest). It doesn't say "WARNING: DRONE PILOT! DO NOT DISTURB!" or any of that crap. It's just a plain old vest. For whatever reason, people see the construction vest and they tend to leave you alone. It doesn't work 100% of the time, but it filters out 90% of the curious.
Second; ALWAYS launch from PUBLIC property. I had a couple call the police because I launched from the street in front of their house. The cops showed up and told them that there was nothing they could.
For the curious people the dork vest doesn't filter out, I'm more than happy to show them what I'm doing and what I'm photographing. In my entire career, I've had only one jerk threaten to "call the police" and "shoot my drone down." I told him, "Let me save you a call." I called the police non-emergency number, put my cell on speaker and allowed him to hear me tell the police, "I have a person here threatening to discharge a firearm within city limits." He got in his car and drove back to his home. My girlfriend wrote down the license plate number, but got it wrong...argh. The police showed up and watched me finish my job. In 8 years, that only happened once. Most folks are nice, but guarded. It doesn't take much to break down those barriers. I find full disclosure and a friendly disposition are my best weapons.
And remember, the FAA controls the airspace. NEIGHBORS DO NOT. Ultimately, nobody can tell you to "not fly" over their property. I had one concerned father ask why I was flying over his yard where is children were. I was more than happy to explain my operation and offered to show him the footage. By the time we were done he shook my hand and we were on a first-name basis.
If they threaten to call the police, tell them that you'll save them a call.
D