As an renter, landlord, and investor, there is an enormous volume of redundancy and ignorant questions asked by prospective renters and buyers.
The logic would be the system would retrieve MLS data to answer properly specific questions, schedule showings, assist people with screening or applications and the agent could oversee the communication to intercept it at any time.
Then, long-term, voice AI and later replace apartment rentals with AI that posts rental listings on various websites.
Consider reaching out to a real estate agency and seeing if they'd be interested in tools to help them search for homes faster?
Biggest problem that I anticipate is the visual aspect. The process is HEAVILY reliant on images. Not sure how you'd integrate that with a GPT system.