Plastic moulding

We see plastic kayaks made by moulding and are unsinkable and extremely strong. 

Why can we not make houses like they make water tanks and cars like they make water tanks?

The answer is we can and they would be fantastically strong and light.

So I say to people with these machines have a go and open up new markets. Australia has poly boats and these are strong and stable. Ten foot boats with 20hp engines that out perform anything in its class. 

Here is one of these boats

Then there is water tanks

So the question is why not affordable housing this one is under $2000.

plastic cars