My dilema is I dislike the rental business! I have been in it for about 10 years now and I dont enjoy it.
But when I think about investing in the stock market (Vanguard Index Funds) it seems like it takes a lot of money (>600K) to start yielding any sort of monthly income. Thus, if anything happened to our business in the near future (I dont forsee it but who knows) I would have to go back to work (FT) to make ends meet (which I would hate!).
With rentals, you have the risk that people won't pay you, damage your place, etc. And you're on the hook for repairs. And you are required to put in labor (which you don't like) or pay a management firm to do it for you. And your rentals will only appreciate at about the rate of inflation--so no real gains there, just income.
With stocks you have price risk (that they go down at inconvenient times) but over the long run they will go up much faster than inflation. You also don't have to do any work, and there's no risk of needing to put more money into the businesses, etc.
And don't look at just the dividend yields of stocks. Their price appreciation is a return to you as well. There's effectively no difference in Coke paying out a large dividend and Berkshire reinvesting that dividend for you and making its price grow.