I'm somewhat new in this game as well but I agree with Brian Garrett on this front, I'd love to buy some rentals in my back yard but cash flow can almost be negative if you go with .95/.5 rules to run some initial figures. Case in point is a Duplex for sale near me that needs rehab but is listed for 425K and will likely rent for less than 3K per month. Homes like these are typical, but I'm sure there are better deals to be found.
In my research I've found that appreciation should be looked at more like icing on the cake rather than the main factor on buying. KC might not appreciate as dramatically, but I like the slow steady cash flow over a long period of time. That said, I'm kicking myself I wasn't buying more properties 10 years ago and it's possible that 10 years from now I'll kick myself for not buying now. Denver is kind of an anomaly and it very well could be the next major American city years from now. I'd love for someone to tell me I'm dead wrong and buying in Denver can work as a cash flow method, I just can't seem to make the rental numbers work.
Now for fix and flips I do think there's a lot of potential in a few neighborhoods. The market is so hot it's a great opportunity to turn around a distressed property and sell very high. Competition can be tight but as a flipper you can't beat this market for selling.