FYI if I was in your shoes, I think the best thing to buy right now are some of these NNN retail deals. Stores that have protection against Amazonification.
I have some NNN retail properties in Houston. Small strip center. One of them has a convenience store + barber shop + auto inspection (amazon can't displace those). Another has a scratch-and-dent appliance shop and, lets just say, an adult novelty shop.
Anyway -- neither of them look pretty. But both are right off the freeway and were 8 caps even when I bought them (a few years ago when banks paid 1% on your $ at best).
You can find 8+ cap NNN retail deals that will be as close to "mailbox money" / passive income as you can get. Few things to look out for:
1) Make sure the rents they're paying are under market. You don't want a property that's a high cap rate but if a tenant were to leave, you'd not be able to find someone to pay the same amount
2) Make sure the businesses are something that can't be easily replaced by online
I'm honestly surprised you can still 'get away' with finding such high cap deals. I'd have thought enough demand would be there to drive down returns. I'd buy more of them (vs. apartments) but it's just too hard to find big deals like that. BUt if you have a few hundred grand to put down and can use leverage for the rest -- that's the best bet (IMO)