I picked one of the $850 ones, naturally.

A lot of times even if you can get the smell out it will leave permanent dark spots so you'll need to use a dark stain instead of natural wood.

Deposit insurance, credit building and on time rent payment rewards (Through Second Nature)What customer service programs do you have in place?

Quote from @Bill Brandt: thanks for the clarification, the parcels being sold are "better than average" the parcels being sold are on a private lane,  with mountain views,  have natural gas,  electric, fiber internet, and cell phone service available. 

Fifth, elements outside your planning or control can increase expenses significantly; tax increases due to budgetary shortfalls, insurance costs doubling due to natural disasters, tenant damage beyond what the security deposit will cover.  

Certain types of glue can outgass smell like natural gas for weeks causing nauseating and vocal complaints.

The Unilin 2g locking system is one of the most efficient ones on the market.I 100% agree the the subfloor/ underlayment/ substrate being attached to as well as how  it was attached to the builder floor(naturally we're not talking cement) is usually the problem in a failed installation. 

Some plumbers refuse to install the cheap water heaters, so they will naturally cost more.

Not necessarily a deal killer IMOAlthough it's against nature, the tree can be removed, the roots poisoned and there should be no damage to the foundation long term.Just my opinion 👍

On the other hand, natural hardwood floors are beautiful!