[rmxt]

Your example isn't very convincing. I don't see the use case of these as being a simple north/south side difference in light. I think the intended use case is for cramped urban environments (NYC, London, HK, Paris, etc.) or big cities at extreme latitudes (Stockholm, Moscow, etc.), where the market for apartment buying at the low price of $200k doesn't exist.

Using your numbers, my pragmatism says that there is absolutely zero chance of me putting 18% to 25% (65/265 to 65/365) of the cost of my apartment towards a single light fixture. $65k gets you two years of rent in a nice apartment in a decent neighborhood in NYC.