On the one hand, as long as we aren't significantly losing money on a month to month basis I feel it best to maintain the property purely from an appreciation standpoint (strong location close to the a large medical center) with an dramatic increase in housing.  

But we also have some stocks that I want to liquidate in the next month to take profit.

Thanks to BP, I maintained a relationship with him before the house was on the market.

So, the issue comes down to what condition the house/duplex fill in the blank is in.If it is a turn key I keep month or 2 plus I start the tax fund right away and heloc for big ticket items If I get on a rehab roll/stock market sale, it goes down to the numbers above if not this numbers go up.Right now, the stock market is having a sale I am nibbling at it.A house that is rough shape you will need more CASH, you will be doing repairs a lot.

Things such as;keeping hand sanitizer stocked in multiple locations in the unitSanitizing common touch points such as door knobs, light switches, shower knobs, etc.Keeping hand soap stocked at sink locations....And there are many more hereI think if you're proactive in things like these, when other owners may not be, it will make you're listing look all that much better.All the best!!

I don't know what your local requirements are for costs incurred/required for setting each type of company nor the related costs to maintaining and doing the tax filings (e.g. do you do your own accounting and taxes? 

I do invest in the stock market but I see the HUGE benefits of long term rentals. 

It's amazing the negative effects rent control has had on the housing stock in areas it's in effect.

As far as my maintaining the withheld rent goes, what are my rights? 

The place was maintained, but they kept having special levies and couldn't handle their money well.