I know your company Norada Real Estate is a hybrid promoter/turnkey company. 

I just went to real estate investing clubs and promoted the property for my first deals.

Thats why you have engineers and architects.From your other posts, are you trying to use this Al section in lieu of a wood gluelaminate piece? 

You can pencil out every last detail for every piece if you are that detail oriented.

Many years ago I remember reading some promoting gap lending, the difference between what an HML would cover(1st position) and all in cost.

A property manager can make or break a good investment and is one of the most important pieces going forward in investing.

Just a piece of advice if you do elect to pull some cash out is to stay at 60% loan to value. 60% loan to value for most products will get you the best combo of rates/costs on the loan. 

If it's an old wood window that can't be replaced or blocked super easily, you could always go down to the studs from the inside, put a piece of treated plywood (painted black) over the window itself, and screw that into place so that it's flush with the studs.  

Talking with a lender he told me its not possible to apply for a DSCR if I don’t already own a piece of real estate..is it true?

For example in Texas a finder is limited to a maximum fee of 10% of the net amount received by the beneficiary, thereby eliminating from profitability a significant percentage of deals.This is the same over hyped, over promoted, over promised, under performing opportunity as note broker, house wholesaler, etc.