I really enjoyed my time as an apartment agent and then as a real estate agent after leaving stage management. There's quite a bit the two have in common. Both require calm and even personalities, excellent time management skills, and an ability to deal with fussy people who think they are the center of the earth in high stress situations. Both require an ability to properly set the stage for persuasion. Both have non-traditional schedules, a constantly shifting group of people, and a feast or famine sort of income. In both cases, you're dealing with people when their masks are off.
There is very little difference between a showing and a show, it's just that the former is over far faster. Think 10 or more tiny improvised performances in a day instead of one or two big scripted ones.
However, as an agent the wages were far higher, the interaction with unpleasant people could be minimized in ways that I could control, and I got to rove about the city during daylight hours and poke about in other people's homes. In rental I was seeing anywhere from 40 to 80% of the first month's rent as take home, and in sales it was about 1.5% of the sale price of a house.
If you don't like the networking and self-promotion that comes with freelance theatre you will NOT enjoy real estate, as that aspect of it is constant. You need to keep in contact with your customers and set time aside every day for developing new leads. It isn't as much of a cutthroat hard sell as you see in "Glengarry Glen Ross" anymore, but you do still have to self-promote constantly. You will deal with a ton of rejection, both of you and your product. Real estate attracts a lot of politically & fiscally conservative folks, so if you can't stand being in a pro-life, right wing, gun-toting office you might want to look elsewhere.
There's also lots of support careers in the real estate industry that might serve. Mortage brokers & bankers, legal & paralegal, property management, condo association management, moving companies, home inspectors and title companies are all involved and share chunks of the stage management skillset.