I've been looking in Leavenworth for a while. From what I'm seeing it's not an appreciation market, and the type of tenant may vary on a street by street basis. And you need to know the tenants you're shopping for. There are 2 large prisons in the area (federal pen and state pen) and a college and a hospital and a military base, which means there are plenty of steady jobs, but if you're expecting one of those workers for a tenant and you pick a street that prisoners' family members live on, you're likely in for some disappointment.
I'm shopping C and D class right now, bit I still don't see it as an appreciation market.
While the market is low on inventory, there are several turn-key properties for sale in Leavenworth, but I'm hesitant to pursue any of those because they're mostly priced right for owner-occupied, ROI is tight, and I feel the market is currently kind of at a peak, and it will be hard to recover from a high purchase price in a non-appreciating market.
There are also quite a few historic homes here, but the renovations and maintenance are out of my financial range.
Hope this helps. It sure helps me to have to write it all out clearly.
(don't be afraid to upvote on posts!)