One of the reasons I was so glad to have my kitchen floor replaced was that I had always felt somewhat uncomfortable having students come over and see it. They didn't seem to care much and seemed to be able to distinguish between "old" and "dirty" and I don't think my apartment has ever cost me anyone. After discussing apartments with one of my students, I can say that at least one teacher was not so lucky.
We chatted a bit about the landlord-tenant relationship in my case and whether or not I had to pay for the replacement (I didn't) and somehow this lead to her mentioning a situation with the first teacher the referral service sent her to. She prefers to drive her car to lessons and checked out the area he lived in for parking possibilities. Apparently, the teacher was residing in a gaijin house that, at least externally, looked pretty rundown. In fact, she said that she was shocked by how it looked as she didn't even realize such places existed.
However, she didn't reject the teacher entirely because of the way things looked. She's a very nice person and didn't want to judge based on the place he lived in though the area did make her uncomfortable. The other issue was that he claimed to have held a job at a fairly prestigious place and she doubted the veracity of what he said based on where he lived. She couldn't imagine anyone who held such a job would live in such a place.
I did explain to her that foreigners in Japan have limited housing options relative to most Japanese, particularly when they first arrive because of the need to put forward as much as 6 months rent right off the bat. The only reason we were able to get the place we did is my brother-in-law, who was already living here, secured it for us and loaned us the money to get it when we first arrived. A lot of people have few choices but to live in gaijin houses until their finances get rolling good and strong. It also doesn't help that foreigners still are not acceptable to most landlords.
She said she may have misunderstood the situation when I explained this to her. There's no reason why she should understand it but it does shine a spotlight on how many Japanese people don't realize the hardships foreigners sometimes have to put up with while working here. However, I'm pretty sure that the fellow couldn't have been working full-time at the place he mentioned (not that he claimed he did) or he certainly wouldn't have been in a gaijin house. If I were in that situation, I'd probably arrange to teach lessons at a coffee shop until I could move somewhere a bit better.