Whether or not it's capital gain vs ordinary income subject to SE tax is the million dollar question.Not enough information was given here to make that determination, which is based upon fact and circumstance. 

I found this example:If the town your property operates in has a $12 tax rate for every $1,000 in assessed value, the taxes you could expect to pay would be determined as follows:$1,250,000/$1,000 = $1,250$1,250 * $12 = $15,000 in expected taxesLooking for someone to course correct if necessary.

That determination led to me building a rental portfolio that can keep my family afloat if I never work another day.Use your “disruption” as the motivator for the next great opportunity, real estate or otherwise.

Check zoning to determine if a mobile home park is allowed there.

You should have determined the property lines prior to purchase. 

This is a terrible way to determine who you should rent to. 

Depending on price and size of the building will also determine amount but I would guess start with $5-10k at the beginning and as it cash flows add money to the account till you reach 10% of the value of the building.3.

Are you trying to determine something specific?

Combing through the tax assessment files, finding the chain of ownership, determining what municipal liens might be attached and scouring Statutes relating to tax foreclosure laws in my state/county (did I mention that I am quite adept at research).

If it is then go ahead and determine if this is something you actually want to do.