So by putting everything down on paper, you can easily correct the client and keep things moving.You mentioned timelines....those are hard to get everyone to agree on in the original contract because a Contractor knows that a customer nowadays will start changing things as soon as they watch that episode of HG TV with their glass of wine.I included on my Change Orders a line to add time to the project in addition to the added dollar amount.

Been a long-time BiggerPockets listener/reader/viewer and been studying real estate investing for years.

Or a couch that pulls out and a tv (den)?

When I rehabbed the basement I tore out the existing drywall ceiling and added sound-proofing insulation followed by a 5/8" fire-rated drywall thinking that would be enough, but apparently the tenants can hear us walking, the dogs claws (we have hardwoods) as well as the TV.

Outside of my principal & interest costs, here are my monthly expenses:Electric: averages $300Water: averages $50 (including irrigation water for lawn)Management (includes weekly pool care, trash cans out & in, pest control): $280HOA: $52Property taxes: $400Insurance: $325Lawn care (weekly): $100Florida STR license: $15Niceties (internet, tv services for guests): $100, and this is generous as I include some stuff I pay for from my own house that would cost more if I didn't. 

So when I moved out, I kept the furniture -- including a huge wall-mounted TV -- and rented it out on Airbnb full-time.

this is math right out of a TV fix and flip program that just talks gross numbers and never any nets.. 

Before the late 1970s there were no real estate gurus, no real estate investment courses, no house flipping TV programs, no real estate get rich books, no real estate investment clubs, and what experience the general public had about real estate was limited to buying their personal residence. 

@Jon Martin  there is a newish extension that allows viewers to see where else a property is listed in you are looking at a property. 

We stage every house every time...If you have an area that may cause questions 'Can a queen bed fit in here' or 'Where do I put the TV' or 'How do I center up the room'...staging is crucial.