Have I done my homework well for buying a new roof based on info below?

Mam I take it your roof is bad so as always it will need to simply be stripped down to the wood, Plywood is made different from osb but for the money replace with osb and any rotten material will have to be replaced. If you plan on keeping this house for along time I would fix it to last, meaning there are cheaper ways of fixing a leak. So many ways to get robbed by contractors, Not saying all of them. But if you are going new get three bids and ask about going with the new metal roofs compared to shingles they come in colors of choice and have I think a twenty year warranty on the paint. Anyway more bids will give you a better idea of cost and labor, Don't mention how much you have to spend. Don't think a contractor will accept payment plans, You would have to get a loan or if you qualify for some program i dint know about that. Hauling off old material should be included in price and do make sure this is clear, Venting a roof is simply keeping the loft part from sweating and the ridge type work fine but the design could pull to much heat out during winter possibly I prefer the turbo type that spin. If the eaves need replaced they make vented plastic replacements that are easily installed. Contractors need to give a recent reference also if you ask and up to them for over seeing job. The felt you mentioned dosent cost much and is needed if shingles are used 2 and 3 tab is simply a longer shingle.