Some "extreme early retirement" sites focus wholly on savings rates and discard the ability of one to earn more than the equities market.  

I do spend more time upfront researching the list and trying to get the letter to the actual owner, but it saves me money not mailing to people who are going to discard my letter right away.

If the price is cheap enough that one last puff might be worthwhile, but I wouldn't pay Havana cigar prices for a discarded Swisher Sweets.So far it sounds like the only evidence of upside is vague comments from the seller.

Example: If rent is $2000 and Mortgage is $1700, discard and look for next property.

As you might imagine I discard a bulk of these.After sifting it down to a small handful I go in and look at them, look at photos, area of town, rental rates, etc.

If I specify in the lease that any leftover items will be discarded of the day after moving am I allowed to do that in MN?

Anyways, what is the protocol for safely discarding these cans paint?

The incredible financing options available to you in your first or any house-hack are a primary avantage and really, in my opinion, shouldn't be discarded.

Looking at this as an example, what metrics do you like to focus on when determining whether to further investigate a potential property or to discard it and move onto the next?

If you send it to the wrong place they can discard it.