Well, you should really look at your entire portfolio as a whole, not just at a single account. But assuming this is your only investment portfolio...
I like holding extra REIT investments in my portfolio as compared to just having the REITs that are included in total stock market funds. So I like your addition of $3,000 in the REIT Index Fund. I'd put the rest of your 2016 contribution in the Target 2050 fund. I'd suggest keeping between 10 and 20% of your portfolio in REITs, however, you will be a little higher than that at first with the smaller account. That's completely fine.