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.

So, basically, if you're splitting hairs over ownership percentage, here's the deal: Your partner dropping $40k on materials means they've got 25% skin in the game.

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

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.  

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. 

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

Thank you all for your input definitely looks like there is more than one to skin this cat.

Longer term, we could add additional cabins to the property (as stated above) since the current owners are sending overnight business to hotels in the area that are 15+ mins away.Our situation:We have about ~45% equity in my home (appraised at $775K about 6 months ago; we made some improvements but to be conservative, let's say this is still a good estimate), I can cash in my 401K, and have RSUs from my company that I can use for the majority of the cash I need to have "skin in the game" but it's short the 20% I will need for an SBA 540 for the real estate + 5% for the SBA 7a (this 5% for the DP is possible if the sellers can finance some of the business).

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.