When returning the security deposit to  the tenant in Maryland you have to include the interest accrued, which is the greater of the US Treasury yield curve rate or 1.5% per year.Who knew we’d have to do calculus to return a security deposit…lol.

Real estate has a ton of math involved, and I’m not talking about calculus.

Get proper legal advice on whether you can reset your depreciation period by selling it to yourself as a different entity (you didn't make mention of any of these LLCs being multi-member, which would change the calculus a bit).

After performing some serious calculus I was able to figure out that this is a 24% annual rate.

I was lucky enough that when I was a teenager, my Calculus teacher asked me to work for him and his wife. 

Also if this is SFR you can have the tenant pay utilities which in your calculus would cut expenses $250 per month

I realize the calculus is a little different since you already own the land, but what I found in looking at other areas, is that even if I could build profitably (i.e. with a margin for profit), it never made sense to hold the property long term because rents were too low.

The understanding of Calculus and Analytical Geometry (actually, just basic Geometry and Trig) will make this easier for you.3 - Learn how to design (and stick to) a REI Plan. 

and just to be clear, the boundaries of a federal superfund site are determined by how far the contamination has migrated and is not necessarily limited to the source of the contamination. there can be groundwater plumes that can extend for several miles so that all of the properties sitting above the zone of contamination would be considered to be located within the superfund site but that are not responsible for the contamination but simply impacted. very different calculus than if the parcel you are considering is a source of the contamination  

I rarely struggle with math and have been successful in calculus and statistics thus far; that should not be an issue to factor into my degree path.