$21,000 is not accurate, unless you're planning to put in a metal roof. 

Novice wholesalers’ scopes of work never project an accurate rehab budget for investors.

The data there is accurate and when you see differences between the system there and some of the national screening services that don't get the data right, it's generally because they go by filings and/or third party (e.g. credit report records) not results of cases.

In this market particularly, you have to be sure your numbers and assumptions are accurate.3.

There's some truth to your statement about the economic system, and your comparison to other developed countries, but it's not entirely accurate.

You are looking at it as "wasting" money on a lawyer, but in reality you are paying a professional to guide you with accurate information for this investment and the knowledge to apply towards future investments.

If you know what features each offers, and the price points for that particular manufacturer you can make an intelligent decision as to what items you want to buy.Or, if you don't want to go to the trouble of learning all of these things, you could just go the "get the cheapest" rout and roll the dice and take your chances, but if you make a mistake and you have 100+ faucets to replace after only a few months because you gambled wrong (or 100+ toilets with plastic flush levers that break off or won't flush much volume, or etc...) you'll probably wish you had more knowledge of these things before cutting checks.Good Luck!

Would you consider the link below to be an accurate flow chart?

Buying new construction and betting on appreciation is gambling, not investing.

Do note that these are approximate and not accurate in all cases.