Things like swimming pools have notoriously high installation costs and very low returns.

College students can be notoriously messy and hard on units in general.

Old mobile homes are notorious for leaking roofs at the wall seam and then the water rots the rafters, the wall studs, and then the floor.

I have read in their forums about other hosts experiencing strange repercussions following conflicts with guests that impact business.The returns are fantastic - but as Notorious BIG stated, "Mo money, mo problems."

Especially given the position of the fence, and that we, and I guess they, believed it to be their property and not ours, this seem to constitute hostile, actual, open, notorious possession and exclusive and continuous use of the property by them.

Yes, some wholesalers are notorious but I think the industry created the beast, as these wholesalers have buyers for their product.

I love learning and I am notoriously cheap so my first thought it always DIY. 

And that open and notorious use has RISK.  

RVs are notorious for not being well insulated and have huge electric bills in the extremes of Texas summers.  

Batt insulation is only as good as your air sealing and old houses - at lease they way they were built here in the east - are notoriously hard to air seal {and you probably do not want to completely seal them as they were not designed to be that tight} While batt insulation is still extremely common here, the problem is once you have air movement your RSi/R value drops dramatically.