Like others have said, the first leap is always the hardest. Without seeing your ROI it's hard to tell you whether to pull the trigger or not. I'm not sure how much you're financing, what property taxes are, insurance, etc. If you don't already, you need to have a spreadsheet where you can quickly plug all those variables in and have a good idea of your potential ROI. I shoot for 15% Cash on Cash ROI or above. But it all depends what you're comfortable with, and if you're investing in Class A, B, or C neighborhoods.
I will say I don't think rents are ever "capped". Do your research on rentometer, craigslist, and zillow to see what you can actually get for fair market rent. Try to get on the summer rent cycle if you can. Summer has higher demand for rentals, meaning you can get more than you would this time of year.
I just bought a duplex in Ferndale actually, an upper/lower configuration. But I agree with you that those areas you mentioned are pretty much priced out.