spinning something out of something means making something into another thing, usually unintentionally. it implies something happens organically and grows bigger than you expected it to. like if i were talking about how i like music but it begins spinning into me performing a song for people.

bring in quickly, encourage in

no, he is looking for a wife. to be "on the lookout" means you are searching for something or staying aware of the possibility of something. he's searching for a wife

yes thats correct. if it rains continuously it means it doesn't stop raining, it has the same meaning as ceaseless or endless or constant in this context.

first is incorrect. second is correct.

that sounds very unusual in english. do you have more context?

the latter part means the areas that result in the most money being made or the company getting bigger