Not quite a conservatory but similar style of work. Did this today and do about 12 - 15 a year locally. Sides take 1.5 - 2hrs. Usually charge about £60 for that. Gutters took over an hour due to stupid gutter guard rubbish in the way! You need to be careful if pricing the roof. This one was really dirty and took over 2 hours. I charged £100 but it should have been higher although I don't think the customer would have paid it! I do tourers as well starting at £40, usually done in under 1.5 hrs Make sure there is power (if required) and water otherwise it's a right ball ache. You can quite often pick up other work whilst there too.