If you will be purchasing materials those cards offer some discounts and in addition you can get pro discounted pricing on larger orders as well.

3- what is the cost of materials?

I actually have two options for this property: 1) Rent out the existing 25 storage units AND rent out the building plus add the 25 additional units out of pocket.OR 2) Rent out the existing 25 storage units and added the 25 additional units out of pocket to rent them out BUT keep the metal building for my GC business to where we have offices and storage for building materials.

@Jonathan Greene we've been promoting this tactic for over 15 years:)I was doing it 40 years ago for my dad when there was no internet so I get it.

But you will want to change the code for access right away as fired contractors can come back and take materials from you for other jobs.

Joseph,Bigger Pockets is the best site on the internet to build a newtork and get all the hlep you need to avoid mistakes and save money! 

Also what brand, material and carpet type should I get?   

Please work this material through your professionals and seek the proper advice. 

Sure, there were a few hiccups along the way (like when a shipment of materials got delayed), but with some late-night calls and a bit of creativity, he turned it around.On the flip side, turnkey properties offer immediate cash flow with less day-to-day hassle.

It's just a product of the modern internet age and you are right, they always have a new way of skirting the rules.