If as O&S said, all he wants to do is place an addition on his phone camera, that is probably a good move, if a cell phone photo is what he wants to use.
However the flexibility of the digital is hard to beat....and in many places cannot be beat with any film camera.
I personally know very little about the technology of of the scene, but I often go on shoots with my son acting as kind of a "gopher", and just trying to be useful. I freely admit that I am deficient with this current high -tech stuff!
So all I can speak from is what I observe. I cannot recall a time when he took a "second shot", because he doubted
how his first shot would come out.
That being said, I can observe the shooting process and the output. My son has been shooting over 40 years, taking
the game seriously when he was a teenager. He of course had his own group of cameras up through medium
format,along with his own darkroom and processing set up.
Now of course, most film cameras can be had for a song, since so many are switching over to digital.
For real estate, when I travel with him..he starts doing outdoor shots, while I go through the house, turning
on all the lights checking that nothing is out of place. No tube of toothpaste left out or a lampshade set askew,
and the rolls of toilet paper are folded and trimmed for show, etc..
When he comes into the house, I stay out of sight, which includes mirror reflections too. When he sets his tripod
for a room he steps back and triggers the camera electronically. The camera takes 5 shots..click, click, click, click
click. Then it combines all 5 shots to find the proper one.
He does many drone flights. In fact, the FAA keeps track of drone usage of all licensed pilots, and he is among the
top 1% of "frequent flyers".
With what I know about the aerial cameras, I don't believe film would be any place in the sky.
First, to have a versatile drone, which can maneuver as his does, cargo weight must be small. The Hasseblad camera on his drones is about the size of a ping-pong ball.
We know any film camera would be much larger..and how well would it adapt, going say, from bright sunlight, into a dark warehouse?
So, take a look at the below photo of an Amish owned B&B about 50 miles south of me in Pennsylvania. These are
called "twilight photos" taken just after dark, and is becoming a popular part of real estate photography.
No flash or floods, no artificial lighting used
I was on that job with him, and that was just one shot..the photo has not been rearranged a bit..outside of replacing a featureless sky.
Pray, tell us how you would accomplish this with a film camera.