While I do consider myself to be a buy and hold investor (not only of real estate, but of stocks/index funds as well), there has to be some price at which even a buy and hold investor is willing to sell right? 

Could you provide more information about your question please.I personally think the best benefit of real estate in comparison to investing in the stock market index funds is the leverage.

And Google indexes this.

You could buy index funds!

https://www.biggerpockets.com/renewsblog/biggerpockets-2017-investment-market-index/?

It's pretty bad that when I want to search on BP that I have to go to Google to do it....Plus...There is a ton of fantastic blog content that needs to be way better organized and indexed so that the many great influencers on BP, like @Russell Brazil , @JD Martin , and Alex can help steer new members to the already existing fantastic content. 

You're better off putting your money in an index fund. 

I put all that money into a low cost index fund.Moving forward I have been cancer free since 2010.

I am torn between something safe (traditional/high interest savings acct.) vs. opening up a Vanguard Index and withdrawing the necessary amount when needed.

You can likely increase that using true RUBS on your actual bill.I would not charge each unit an equal share unless they are all the same type (1br,2br,etc) if using flat rate RUBS, and if you are dynamically allocating RUBS it should be indexed to style and occupancy.