My husband is also a GC and can help with estimates on the build! 

I know I can look at an amortization schedule, but I am guessing there has to be a simpler way to quickly estimate the numbers - can't find a decent online calculator for thisAppreciate any help - thanks!

I just got the first estimation for my loan/closing costs, looking for any assistance on analyzing if these costs make sense.

I was in the field all of the time and I was responsible for estimating.  

Did I properly estimate the cash not only to buy the property but also the six month reserve funds that some lenders are requiring for non owner occupied units?

But one thing we do is if the project is extensive (which usually means more potential surprises), we'll have our service providers walk the property with us and provide more accurate estimates on their SOW.

I'm not sure the house would make a good rental property anyways as rent estimate is below 1% of value.

The charge for doing so can definitely cut into your equity as it can be 10's of thousands depending on the estimated value of the home. 

I just need to know is there any type of private lenders who specialize in much larger transactions with having windows on time of finish which I estimated at around 2 years.

I've dug around and talked to a few window people to get estimates and it seems like each installer is trying to sell me on a different brand and I'm trying to understand the differences and advantages of each.