Here is a summary of the book.https://www.nateliason.com/notes/long-distance-real-estate-investing-david-greeneThe book also mentions the importance of having a rockstar Realtor, contractor, lender, and property manager.

.- Team: Other agents/brokers, lenders, title, attorney, contractors, inspectors, etc.- Experience in specific areas and with different property types.- Process for analyzing/screening potential deals.- Anything else that is relevant to the individual.

I'm not a contractor or flipper, but I think you should focus more on what the ARV is rather than trying to back into the seller's expenses.

Can the contractor legaly continue working after 5PM?

This will definitely be my last...The hotel is currently getting rebranded and unit owners have the option to upgrade our rooms using the hotels "discounted and preferred" contractors for the "low price" of ~160k (again, the unit cost me 400k and is currently valued at ~340k).

I'd suggest you start asking other investors in your market for general contractor referrals- people who do quality and reasonable work on rental properties in your market.

And they said that’s just the preliminary contract … I have no idea what that mean … I haven’t even pick out the flooring and vanity . got a second opinion and the contractor quote way above what insurance already approved from the first contractor .

I am a licensed contractor in Orlando, FL.  

Anywhere from small contractors, pest control, welding, even crossfit, etc.

We are self performing the entire build with exception of mechanical sub contractors