Because it's my dad, we have some flexibility in how we structure that segment of the deal.

Personally, I think the Class A apartment segment is over built and there is a huge inventory under construction which says to me there is pain on the horizon.

Great video and thanks for sharing, Marc.The Fox News segment captured the essence of the problem very well. 

Which areas/segments of the rental market are the weakest?

That's a pretty good segment, lots of people look at moving to a small house as an alternative to apartment living.

I would suggest taking it to the local news channel for a "compassion" segment.

And its a very large segment of the non owner occ market in many mid west and ( upper and lower) and deep south cities... were you have a very large % of SFR';s that are rentals.

This won't get all the bots, since there are so many out there.The other thing I like to do is create a custom segment that filters out traffic that doesn't have the hostname equal your domain name.+1 for WordFenceSucuri is also a good security plugin

In the process you may discover if there is a reason this segment of the Prefabricated Home Manufacturing industry hasn't migrated to this type product.

I suggest you get a very knowledgeable attorney who has a wealth of practical knowledge in this segment or RE.