I have always assumed that this means if I make say 40K at my W-2 job and have a lot of rentals which with depreciation (or say a Cost Segregation Study) show a loss of 50K I can take my taxable income down to $0 and then actually down to a -10K, but if those losses were 80K, I could only go down to -25K, and then the remaining 15K would have to be carried forward.

I can imagine a scenario where a REIT investment manager buys up some property...say a mall...and the value of that land and structure increases over time. 

If you get a 10 year signed then sell in 3 years you still have 7 years remaining on the lease and then the buyer sees they can likely get great financing and have say a 10% rent bump in 2 years.I have seen some buyer purchase at low cap rates regardless of years left but location had to be an A+ with and A+ tenant to feel strongly if the tenant went dark they had high dirt value to re-tenant and upside.          

Assessed price $60,000Purchase price $40,000Difference $20k, 33%That would be worth the reduction...I would say a $10k or 10% reduction is about the lowest I mess with, most of the time these are 25%-50% spreads and definitely worth the time.To answer the question "Can you go lower than the purchase price" - I was successful arguing a turn-key sale sold to an owner who didn't know the market resulting in a +$50k value increase which the school board was pursuing an increase in.

You say a fair market rent and divide it between us but really if you buy the house you would be charging them a  fair per room rent.

When an agent is in demand and has, let's say, a dozen active clients at one time it is remarkable that people ever think scolding, yelling, and otherwise being a turkey to the agent is the way to get the best of the agent. 

Lets say a prime property hits the market around $1.6 increasing the down $120k. 

Plus, I offered to pay his commission if say a FB marketplace listing didn't pay a commission, plus offered a $500 bonus if he got her out in 3 weeks.

You’re quick to jump and say a homeowner should have reserves to weather cancellations outside of what was originally agreed upon, but not acknowledge that the guest has disposable income to take a vacation.

I do understand size plays a part in this so let's say a house is 1500sf.