Rachel, these are not the best photos, but here are some before and afters of the first floor. We created an open living area with a completely brand new kitchen. We also finished the attic into a bedroom and flex space (we use it as a TV room), added a half bath, completely remodeled the full bath, and added a huge walk in closet off the master in one of those skinny little awful additions every single little house in Oak Park seems to have.
Before (Living Room) - I know you all want to know where you can buy that sofa, but the owner took it with him :)
After (living room and shared dining area)
Before (dining area and doorway to an AWFUL kitchen - there was about 2' of prep space and only one run of cabinets)
After (living/dining and new galley kitchen)
Before (kitchen)
After (kitchen - doesn't show it, but there are actually two sides to it now!) it took a lot of reworking of closets and stairs, but we needed to rework the stairs anyway to gain access to the finished attic)
This was our first house/very passive investment property so the finishes are a little much for the area in Oak Park it's in. They have incredible schools though so people are willing to pay top dollar to have that zipcode. I don't think we are going to make the kind of profit a true investor would be happy with since the house was a total nightmare when we opened it up, but a lot of those problems should have been caught by us in the beginning. Our exit strategy worked pretty well since we love the house and won't mind staying until the time is right to sell. We financed with an FHA 203k loan. Like Mary said above, if you are knowledgeable about architecture and design and can offer something a typical old (or new) house can't, your crop of buyers will appreciate and pay for that.