Those averages include millions of unemployed or underemployed. And they may include children and retired people.
The very bottom wage I have seen anyone being paid in Cebu, a city of two million, where it was not a live in and eat situation, is about $8 per day. This is the typical rate for unskilled work, like serving ice cream at the mall or janitorial work at a restaurant. I know a few people in their late teens and twenties who earned this wage. Basic survival. Most of them pay rent. I know two of them who live in places much more basic than this. Their rent comes to $20 per month for about 100 square feet of bamboo shed, in the backyard of a nicer house. So we can look at that as the minimum wage for someone who is actually working. I did a lot of research into that because I've been checking out many businesses. About 60% of the population live outside of the Cities and many of them are not required to file income tax or communicate with the government at all. Putting these people into the average is the only way I can see that that number could have been generated. It does not reflect the wages of anyone I met, except for nannies and other live in help.
The man who built this house has a decent job that probably makes double that. So something that he could pay for, on his own, in a year. He is living here with his daughter. Typically a house this size, holds at least two employed people. His daughter also has a decent job, and that's why they left their much nicer home, to live in the city, temporarily.
It's almost impossible for the average person to get a loan and a mortgage, so people pay for their house once, instead of three times, over the course of 25 years or so.
But you are correct, the average person has to work much harder to get anywhere in life, in many places in the world.
The life expectancy of this building is probably 20 years or so, for the non concrete portion. The concrete and tile represent about 60% of the total cost. So in 20 years, someone will have to spend 6 months wages and rebuild all or most of that. But in the meantime it probably won't be painted or have other money thrown at it. Usually at the time of rebuild, the sheet metal will be scrapped and new roofing purchased. I did not see an asphalt roof during 5 months in the Philippines.
It is a very basic home. He wanted to put a roof over his head, so that he could afford to live in this city, that is much more expensive than his home island, while collecting the higher wages available here. It is missing an expensive HVAC system. There is no need to heat or cool, as people here are perfectly comfortable in the shade, with temperatures that nature provides. A night time low in the high 70s and daytime high usually at about 88 Fahrenheit. It seldom wavers from that.
This house contains very few things that wouldn't be safe too put on the
compost pile. So although some labour is required, to maintain it, this house won't create a toxic mess upon its demolition.
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I was mostly interested in this because I need to provide quick temporary housing when I buy some land out of the city, where it is likely to cost $1,500. I can put that away in a good week, working in Canada. And that's the part that's important to me. I also need to provide my mother-in-law somewhere to live. And at some point I may need to provide housing for live-in help on a farm.
But really there's no comparison. This is a glorified shed that works quite well as living space for people who are comfortable when the temperature is almost always between 78 and 88 degrees Fahrenheit. It has a water pump, a sewer and bathing facilities. To me, that's a house.