Hi Jennifer, happy new year. Now that I'm done with the pleasantries...You're going to get hosed on a deal like that.
Assuming FHA loan, your payment on ~800k loan will be almost $4,000 a month. So what's the draw? What kind of background do you have to be able to afford 4k+ on mortgage alone (not even factoring in taxes!) because any vacancy means you'll be paying that.
Spending big money like that for 2k rent isn't an investment. If you said you wanted to pick up a duplex for 200k with 25% down, and be able to rent a unit for 1k (very doable) then it would make a ton more sense. You're now covering (hopefully) every dollar in PITI and hopefully some reserves, meaning you live as close to "rent-free" as possible and saving a ton of money for the next investment.
What you've described is buying a super expensive mansion-multi where someone covers a small fraction of your very high costs of living. At that point you're not an investor, just someone probably dealing with a high-maintenance tenant on a very expensive house.
Lets assume your minimums hedge to the middle of the curve...call it a conventional loan on 25% down of a 700k duplex, renting out at 3k a month. It becomes a little more palatable with your monthly payment around 2300 a month before factoring anything else, but still not cash flowing to get you ahead.
I know you wanted "best towns" advice and frankly, if those are your numbers, it simply doesn't matter. You can live almost anywhere you want.