--Take out the HELOC on the rental and my stockpiled cash and pay off the mortgage on my main home in full and call it a day until the crash comes along when I will have likely saved up more money and have equity in my home, but of an unknown amount.

Data offered (there will be differences in the amount of data available on a given property)4.

Will be well over a million even though the principal amount is less than a million.

You should check how long Bayonne didn't do a re-evaluation for that matter and be prepared (depending on your neighborhood) to have doubled amount of taxes. 

Good Afternoon Investors, Is there a rule of thumb you follow for targeting the amount of cash left in a BRRRR deal post-refinance?

If both units are occupied with month to month leases, am I obligated to keep the current tenants or can I give them "X" amount of days to vacate the property upon closing or the like?

I think you should examine your projected rent amount very closely.

If that hole has been there any length of time its very likely you've had significant amounts of water inside, given Houston's weather. 

The flame pattern on the burners had a significant amount of orange flame, indicating the burners could need to be cleaned or may not be properly combusting, and 3.

Getting early success as a Realtor isn't all that easy and it sucks working for free for an extended period before you build up a decent amount of commission - if you go this route, maybe consider joining a team, so you're fed leads (but paid less) and have tons of support.