Thanks, everyone. I'd respond point by point, but to be honest I'm rather dazed and confused by the jargon. It's going to take a few days to look that all up so I know what you said. Well worth the effort, though. I went through each link you all posted, though, and it's a treasure trove of info. I appreciate it.
W6UV: We have a car, but I'm almost never able to use it due to medical issues. I'm more or less a shut-in.
ZENKI: I didn't understand the jargon in your post very well, but I get the overall idea. I would have no idea how to do terrain analysis, but maybe I can figure it out. The deck looks out into a fairly flat area, but straight back behind the deck (and through a bedroom, a bathroom, a hallway and a garage) is the top of the "mountain". It IS a mountain, but tiny. We're talking maybe 1200 feet. But the view from up here is rather vast, taking in all of Issaquah, Bellevue and even Seattle in the distance, with the Olympic Mountains right behind her. I'm hoping all that wide-openness will help. Still, all of that is not in line of sight from this apartment. I have a lot to learn, but I'll understand the jargon soon enough.
LA9XNA: That PDF is fantastic. Thanks for that.