The previous owners invested over $12M into building it between 2009-2012 but then left it vacant for years, allowing it to naturally age.

I've been investing in apartments for the past year.

That's exactly how HMLs are avoiding the licensing requirements in some States as imposed by Dodd Frank.

My unit count is much less but the duration is around 50 years (combined my mom’s rentals and my rentals) without paying a tenant to leave or having to do an eviction.  

My mom barely lives off the income from her properties that she worked her butt off to obtain over ~30 years.

About four years ago, I transitioned all my long-term rentals to short-term and vacation rentals, and it has proven to be the best investment decision I've made.

Should I go for a 5-year ARM, or DSCR, or try to get a long-term ARM or DSCR loan?

Its appraised at $300,000 and we owe about $220,000. we are currently renting out that property as a rv pad to a friend of mine for $750.I'm a ticketed carpenter with around 10 years of experience and make about $85,000 a year.

My tax guy need it for filing my taxes next year.

If you’re opening a bank account out of state of your LLC, generally you’ll need a state business license for the state you want to open the account and register as a foreign entity.