I completley agree with @Lawrence Potts.
1)Talk to a lender first, no one here will be able to tell you if you are able to qualify for that loan. Also, it'll depend on what you're putting down. Are you intending to put down the full $200k you've saved? Or less? Also talk with a lender who can walk you through the pros/cons of FHA vs conventional. FHA is spoken about like it's the best thing since sliced bread on these forums. But FHA is a loan product made specifically for people with less than stellar credit and higher debt to income ratios to enable them to buy a home. This doesn't sound like you.
2) what's your goal? Do you really want to be able to buy a home like the one you linked to? OR is your goal truly to eliminate your living expenses? It's very easy to squirrel and bounce around on strategies, but always come back to your goal and make sure you're buying properties that match that strategy.
3) is this finished basement home with a 2nd living space in the basement a COMMON thing to find, or no? Inventory may dictate what you can do with that strategy.
4) if you don't already, get a Realtor in the area that knows the market well and can guide you on your strategy.
5) Can you afford the full mortgage payment if finding a tenant becomes challenging?
Overall, I'd say it's a great strategy. It's often tough to househack when you have a family so I love that you're looking at ways to make it happen. I personally would want to find something in a lower range to try to eliminate my living expenses or make them as low as possible. However, my focus is on my budget and expenses, whereas yours may be on quality of life. That's the beauty of real estate, there's tons of ways to invest and make it work for you. Focus on your goal, and make it happen!