It's simply not possible to have a notary we "know" in every jurisdiction.

Would they simply apply the roughly 1/3 Debt to Income ratio regardless of the heloc facility one has in reserve? 

Simply create a "common expense" category, or several.

Property is appreciating and rents are sky rocketing because lack of housing available in that sector.  

When I see a for sale by owner or I see a building that interests me, I simply knock on the door and ask to speak with the owner. 

We have a great market and I see tons of deals frequently in my area, I just lack the capital to purchase them.

Will my new lease be simply a "company name change exercise?"

I'd simply reply that the duct work isn't covered because you didn't touch it.

You're simply co-borrowing money on a property you don't own but want to buy from your co-borrower later? 

Simply put, you're way too big of an expense when they sell (even for reduced commission, as over many deals it adds up) and they would also get the added savings when they purchase either in the form of price discounts or getting the commission.