@Mike F. - I am not experienced enough in all these field to tell you what you should expect as a return rate. The question is also a little tricky to answer as for many of these vehicles, you may need to look at cash-on-cash, total return, and probably half a dozen other factors I'm not remembering at the moment. However, below is a few quick blurbs on a few of them:
Investing in a REIT as a general consumer has the benefit of a fairly stable dividend, plus VERY low time investment. I have focused on medical REITs for the long-term appreciation play, as well as consistent 5-8% dividend yields in my ROTH IRA and 401(k), since I won't be touching that money for another 30yrs. Note that these yields don't take into account fees or taxes.
Turnkey rentals can have returns as wide as the sky. Generally speaking though, the guys who have been doing turnkeys for awhile with success seem to get their cash-on-cash ROI into the 10-20% range. Take that with a grain of salt, as I don't have any turnkeys of my own.
Bridge loans for flippers are very risky, but yield potential returns that can dwarf the others. I've seen the ROI for such a loan as high as 40% for a 6 month loan. On the downside, you're probably in 3rd or 4th-lien position, so good luck getting your money back if things go south.
SFR purchases and multifamily investing have both been gone over in detail by other, much more knowledgeable investors. Generally though, most seem to feel that you should be getting at least 8% on your money and beating market index returns, plus you have greater control and thus greater potential for returns through your own hard work.
