Why do you need it 2-3 times a week if you are an outdoor runner? I also run outside 3-4 days a week and weather only stops me, max, 5 times a month.
But I do have a treadmill, I opted for a cheap Preform (under $700) and it has lasted me for years. However, it's loud, but it works. There are quite a few fitness equipment stores in the area, but you have to be willing to spend at least 4 figures.