Quote from @Conrad Tillman: Quote from @Jay Hinrichs: LOL  its kind of like 50 ways to leave your lover.And its very much dependent on your jurisdiction. however I will list the stuff I have gone through the last decade or so through about 200 new builds in 4 markets.1. material price fluctuations. rarely down almost always up pretty much annually. 2. as we all know labor  scarce  and or unqualified and do poor work..

Shortages of construction labor and material will also have a major impact upon pricing. 

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?

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.

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

The primary challenge was ensuring the property met all zoning requirements for residential use after being a commercial space.

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.

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

In the meantime, i recommend hedging your leveraged real estate bets (which are essentially, leveraged U.S. treasury bond bets) with non-financialized hard assets like commodities, precious metals, crypto assets, fine art, etc.