I gravitated toward becoming a real estate investor 8 years ago without realizing that was happening.We bought our first home in 2010 (foreclosure) with cash during a time when prices were near bottom, and we bought using 60% our own money and 40% private loan from my MIL.

I started out with a very small amount of private money($20K) and my own cash.

Before closing, I made sure prorated rent and security deposits were included on the HUD; however, the seller shows up at closing and said they just found out that tenant B had not paid their rent this month per the property manager. 

I have a duplex I own free and clear, and just need some additional money to finish rehab. I want short-term money, 6 months max, loan amt $50K, with property as collateral. I just had it appraised, and that came in a...

Make sure the property is secure.

Regardless of your plans, get the tenants to sign estoppel letters verifying their security deposit, rent amount, etc.

After all, a low pot is coming from Canada who has the best manufacturing and growers and this would screw Mexico's drug cartels (if those walls ever get built).Issues that operators face Politics aforementionedDifficult to get lending - some banks have an outright banIt's the wild wild west - similar to the Crowdfunding sites where companies are jockeying for dominance to be the eBay or Amazon of the spaceWays to Invest In Cannabis Repurposed industrial space to store inventory as well as growing CannabisBuy the ETF like MJGive an unsecured loan or invest in a Fund that funds operatorsInvest in a syndication/private placement

If it's closer to $1200 than $1100, it might be worthwhile to see if you could offer them $500 + their security deposit back (which you'll probably have to return anyway if the previous owner didn't keep good records of the move in condition, which most don't) and see if they'd be willing to move out. 

It was quite possibly the most difficult deal to secure but we're off and running on our first deal as business partners.

You should have access to SECURE (HEPA issues) and often quick communication means such as fiber to your building.