Hello,
Congrats on your new adventure! Are you currently renting now or do you own? The reason I ask is that I ask is that there are some very good first time home buyer programs in the Twin Cities that you may qualify for if you've been renting for at least 3 years.
Yes, FHA can be used to buy a duplex and they may actually give you a fairly generous credit of the estimated rent towards your income for qualification purposes, which might be very important for a self-employed person.
As far as the area to settle in there are plenty of great communities in the Twin Cities that might fit the bill. Your Target price point and mortgage payment is going to decide where you should be looking. And then, if you have kids, schools will probably be a big concern so that is where you're going to spend a fair amount of time researching and deciding where you want to relocate.
Also, you're going to want to stay out of some cities that will actually tax the heck out of your business if you're not careful or have ridiculous license fees.
There are some cities in Scott County like, Savage and Shakopee that are in a great centralized location with a varied housing stock and reasonable business environment. Also, Chaska in Carver county or Plymouth and Maple Grove in Hennepin county.
I run a real estate brokerage company in the Twin Cities with my husband and we would love to give you some more advice and assistance if you're not working with another realtor. We can help you with pinpointing areas where you will want to buy a home, so if you rent for a bit, you won't have to relocate your family too far for the move.
It would be nice if the kids didn't have to switch schools and if you didn't have to relocate your business a large distance which could add complications.
The right City or neighborhood for you is going to depend on your Target price range and what's most important to you and your family as far as schools, proximity to parks, recreation, etc., While still being in an ideal location for your business.
Luckily, there are quite a number of areas that should fit the bill and this is a incredibly rich Market as far as reaching a large number of consumers...so hopefully you will see some solid growth in your business. Let me know if we help further and best of luck!