Evan's place is perfect for two people. The space is fairly open and easy for two people to navigate. It's in the basement of an old house in a wonderful neighborhood within walking distance to most things that seem to matter in Portland. We had a very hot weekend and bought a fan for the property, so we know there is that to cool you off. Otherwise, I suspect the basement is usually very cool and comfortable.
We were in town for a wedding and didn't spend any time cooking or using the kitchen. However, we noticed it had a full set of pots and pans, a full knife set, cutting boards, silverware, lots of plates, and some basic essentials for cooking. It would be easy to spend a week in this space due to the space and the kitchen. There is no dishwasher, which didn't matter to us, but might to you.
Evan has some room to improve as a host and I've given him honest feedback on those areas. I believe it was reasonable feedback and will make him one of the best hosts you'll ever have!