@Anand S. everything that was already said PLUS (something to keep in mind AND continue to watch as government policy changes) is the unskilled / semi-skilled labor supply.

I was looking for a Template of a line budget to supply to contractors. 

Try to go see their work if you can.Make sure their licenses are current (yes, they'll show up with expired licenses)They'll want some money up front for parts and supplies and to pay their hourly subs/workers.

There is also market availability to deal with, supply and demand and on and on and on. 

Scheduling, skip tracing, data entry, photo editing, pricing supplies, transcribing calls, etc. are all $10 an hour items you can outsource pretty easily.I think local $10/hr tasks are harder to outsource like placing bandit signs, picking up materials, etc..

It’s true, the value in our market is in the land and given that there has been much higher demand than supply the last few years, prices have gone crazy.

If you have water in the garage, is it from the Supply INPUT or Sewage OUTPUT? 

Also do the same from 2005 to 2011 in the same city, what were the features that contribute home sale price during the Great Recession.One can step one step further using stock analysis tools to under stand demand and supply, multiple offers to predict when the home prices will max out.

Now as a real estate investor you inject yourself into this housing system of supply and demand as being  provider of housing for a price of course. 

Although we've both been known to grab the cleaning supplies and do a move out cleaning if we need to.