Yuka’s place is in a very quiet neighbourhood in Hatagaya-2 train stops from Shinjuku. The place is spacious and easily fits 6 adults comfortably. The place was spotless and all appliances were in good order. (instructions in Japanese only) Yuka helped us out with this. We went to eating places on the main street near the station but if you go down the alleys you will find many more. A laundry is close by to dry clothes.
We used a Suica card for getting about as we always needed to catch the train back to Shinjuku station to make connections to other lines. Daiei supermarket is opposite the station on the main road as you come out of the North exit. If stairs are a worry for you, you should take a taxi from Shinjuku to Hatagaya Station (North exit) with your suitcases.
We would recommend Yuka’s place to stay.