My wife and I visited Czech Republic 3 years ago, loved it and want to return this October. We would prefer to spend less on hotels and more on sight-seeing. While in Prague we would be OK with staying 10-15 minutes out of the city to save money. What districts would you recommend or advise to avoid? We're in our 60's and prefer not climbing 3 flights of stairs to a room, but are fine with walking 15 minutes to the metro.