Hey Thomas!
I'm right down the road from you in B-town! :D
Since you're looking at these options, I'm going to assume commercial is out for you (5+ units)?
The answer to your question is, it depends. If you go with a big house, how okay are you having people living right there with you? And then you have to consider what happens if things go south and you have to evict someone? Personally, I can't stand having another stranger in the same house as me. That's just me. Too many things to go wrong.
A house with a MIL apartment, at $320k... Maybe in Ogden, or here in our area. Maybe. B-town is nuts right now and prices are a bit on the high side as people from SLC, with higher prices, are finding out you can get a lot more for the same money here.
Duplex's are a dime a dozen, and a good way to start. Once you have a good amount of equity built up, you can pull that out, rent out the one you're in, and move onto another one, and so on.
It all boils down to you. And don't be afraid to look in some of the outlying areas. WVC and Ogden both have decent areas. You're just going to have to dig a bit.
Good luck!!!
Aaron