Sumiyoshi is in the east of Tokyo and it is a relatively calm area compared with other areas in Tokyo. However, it is very convenient place. My place is very near the station and we can use two train lines leading us to Shinjuku, Shibuya, Akihabara directly.
The fee is for two people. Your sleeping is good enough, but the toilet and the kitchen are a bit away. And I don't have showers, instead, you need go to sento, a public bath. However, I am sure you can enjoy it.