I've got connections on a bunch of these categories! 

I know depending on where an investor is in their fix and flip journey and the market this will vary, but Im curious because I feel like this is important when it comes to a good deal since some investors might not mind making less to have more doors. 

There are varying opinions on this but mine is: cheap never goes out of style.

Weather differs depending on where properties are located and even snow accumulation within the same geographic area will vary year to year.

Materials will be about the same, but labor may vary greatly on location.

Price points will vary widely here.

I've used Propstream, Red X and Real Estate skip trace with varying levels of information accuracy.

A great REALTOR will help you gather rental history and the cost to own and show you good sites for pulling rental projections, but you will need to do your own calculations.Everyone's mileage varies.

Disclosure laws vary greatly by state.

Most lenders will vary how aggressive they will get based on the experience of the operator (you), but I don't know any that will lender to someone who's never done a spec build like you're contemplating.