My "rant" about mobiles is not something to get upset about. Seriously, why do you want to rent a telephone for 14 days in Japan? I honestly do not see the need. It was a sincere question, however you see it framed.
Accommodation for 5000 yen/night is very easily found. Go to any Google site for those cities, or ask on the Lonely Planet Thorntree discussion forum, or just open a guidebook. Tourist hotels or business hotels abound, and the prices are pretty much what you seek.
And, yes, I could have looked up visual kei, but I politely asked. I also gave you additional information that you could have checked, and you didn't even so much as acknowledge it. Thanks for being so rude yourself. You're not making friends here.