The paperwork and making sure everything is legal and up to code while still not shoveling out money needlessly. 

While a metallic footprint consistent with a large metallic object present, the absence of a fill pipe or vent pipe necessitates the need to excavate the area with shovels.

As a landlord, you won't have to worry about getting citations for the tenants not cutting the grass or shoveling the snow.    

(Averages out to $333.00 per year)Lawn Mowing & Trimming during the cutting season (7 month's) is at a cost of $270.00 per month or ($1,890.00 per year) which includes being cut & trimmed twice a month (every 2 weeks).Liability Insurance cost is $302.00 for a year for a Three Million Coverage.Electric for the well and night lights is $73.00 per month or ($876.00 per year)All renters take their garbage to a County owned dumpster so there is no garbage or trash bill.The gravel road is so compacted it only takes a few shovel's of gravel per year to fill a few dips.Gross Income:13 lot rentals x $175.00 each per month = $2,275.00 x 12 month's = $27,300.00 yearly gross income.1 RV lot rental x $300.00 per month = $300.00 x 12 month's = $3,600.00 yearly gross$30,900.00 (gross yearly income) minus $4,021.68 (yearly expenses) = $26,878.32 (net yearly income)There are (4) septic tanks and (1) well for the lot's that convey with the park and "all renters" pay their own electric bill.

Where in FL are you looking at deals?

So the only remaining issue is the root intrusion under the lawn.I've spent some time digging with a shovel, and have found the line.

It might be worthwhile for you to go through the zoning yourself and sell the lot "shovel ready" with approved variances for a bigger project.

Is the land itself more valuable if it's shovel ready?

And I thank myself daily for only buying this building with those property management costs factored in, so now I'm ready to let go, the building will still make me a profit.Plowing  - and sidewalk shoveling. 

DFW, Midwest, or FL are pretty hot).