How can i create a continuous quad mesh from a non manifold polysurface?

here is the file in case you want to check it out
helpinrhino.3dm (689.4 KB)

Is this different from
"Why I can’t do a boolean union in this case? "

At the end, I couldn’t do it manually, i mean, trimmin and joining, and doing non manifold merges. Neither i could do it piece by piece on autocad, i don’t if im explaining myself well in this last one.