Making a greenhouse out of a recycled bus or car

When I saw the thumbnail that goes with Paul's thread about the truly passive greenhouse full movie being for sale, I thought--wow, they recycled the front of a bus! But of course, on a full-size viewing, I could see that it was not.
The attached picture  is what I thought it looked like.

In a mild climate like mine, could I make a little greenhouse--nursery out of one of those--as I can probably get one out of a junk yard. We don't get much colder than freezing, and in recent years we don't even get a freeze. We do get hail, and we do get huge extremes in temperatures so it is good to have a place to protect nursery stock.

We are at about 1600 meters above sea level, roughly 5000 feet. hottest hot temp upper 90s F mid day, (mid 30s C) and lowest 32° F/ 0° but usually more like 5°C which is about 40° F

So if you think of a van like that in the picture as a shade roof on top, that cuts out a lot of light, and plants need light, especially in the winter.  IN the summer the light would be overhead, and that van would shade it out.  The only place that might....might work as a greenhouse is in a crazy hot part of the desert.  Doesn't sound like your conditions are like that.  It would be quite dark inside there, because not that much light comes in through the sides.  

A DIY greenhouse is not expensive, if done with 20-foot rebar hoops covered with PVC pipe, and either greenhouse plastic or 80% or 90% clear patio panels.  Chicken wire ends, and depending on how cold it gets, greenhouse plastic over the ends in the winter, and remove it in the late spring into the late summer.

I have seen a clever root cellar for cold storage where they cut out the side of a steep hillside, and shoved a van, engine first, into the hillside, covered it over with soil, all except the back doors, which were used as the entrance.  

Thanks for the reply Cristo,
At first I was thinking old buses like this would just be a good source of windows/glazing. We don't really have reclamation of building materials around here.

In Oaxaca, it is a desert. Summer is not the hottest time of the year--nor is the sun overhead in the summer as we are well south of the Tropic of Cancer. What we really need is something that mitigates the extremes of temperature, so probably a sunken greenhouse/ nursery.

Melissa, that bus looks perfect for a greenhouse.

It may not perform exactly like a greenhouse though I feel it will grow plants.

Here are some threads where folks did something similar:

https://permies.com/t/86411/Greenhouses-RV

https://permies.com/t/72544/thinking-loud-Fiberglass-class-rv

What for one without power windows!

Google turned up quite a few school buses converted to greenhouses. Most with the roof removed. We could do a partial roof cut out. Shade is an issue--I should compare the cost of transporting a bus out of the junkyard with a roll of shade cloth.

I used the dashboards of an old truck and a station wagon like that once, a wild lot with zero infrastructure but lots of dead cars. It worked for keeping seeds protected at night and from birds until my beds were built.
I think you'd have to make a huge sun roof for anything long term