To get financial planning licenses 400, 500, 600, 700 series they want to see courses you have in business, finance, and even calculus and statistics.  

When you are doing that calculus to figure out where your equity would best serve you, and this will be anathema to some, though you probably have already thought about this anyway:  figure in some appreciation!!  

I use stochastic calculus every minute of every day!

Posting could have negative impacts on your other ventures from something, such as negative press coverage, so now the risk calculus says that the probability weighted impacts from the bad outcome far outstrip the positives of getting the unit a month sooner; now it is in your best interest to NOT evict as soon as you can. 

@Vincent HerreraIf the unrealized appreciation is material, a 1031 exchange might be advantageous if you plan to reinvest the proceeds in rental real estate.This is a calculus that takes into consideration the cost of professionals to help with a 1031 exchange vs the tax savings achieve through the tax deferral. 

@Carolyn Hodo The calculus involved also demands you consider the transactional costs of selling this property and buying another, as well as the projected ROI of the replacement property.Real estate is illiquid. 

You're talking calculus while I only understand algebra.

Do kids really need to be taught art, music or even Calculus BC over basic accounting and financial basics? 

. $5000) makes the most sense, but I'd love to know the calculus made by pros on this.

Part of my calculus is the size of the lot too (2.5 acres).