This will all be very challenging, but is doable. 

Hours at work also plays a part into it as well.If you have any kind of real responsibility at your job and people breathing down your neck, doing this part-time while you still have a day job, is doable but it's not easy.

It's stories like that which got me started, and made this "investing thing" doable and real in my head. 

Yes, possible, and definitely doable.

So long as people continue to let their homes fall into horrible disrepair, there will be a market for somebody to hold their nose, take it off their hands, fix it up and flip it.Also, don't forget, NYC, SF and Seattle aren't the only games in town.Is a mortgage on a foreclosure or short sale in NYC doable?

It's doable for sure like @Joe Norman said. 

@Tyler Dalton 90 day seasoning in Baltimore is doable without tax returns or income verification for many portfolio lenders. 

It’s definitely doable!

This depends on a lot of economic and political variables (gee... nothing interesting going on in the White House these days...) but is doable.

They seem very challenging but doable.