The key to these tough conversations with a long term renter is timing (slow increase) and most importantly delivery.

Your success will be in the delivery.

Can't hurt to send direct mail and if you can find a legit phone number give the owner a respectful phone call expressing interest.

I'm often beset by the feeling that I see the world differently (not better, just differently) from many but am unsure of how exactly to express it in a group setting. 

The expense is more up-front but is far more cost-effective in the long run.Regarding your specific question, unless they have an agreement with you there is no expressed or implied contractual obligation for you to hold the rent. 

@Adam Fortier I use email if the file is small, otherwise I use Gdrive for signing leases and other 'non-serious forms' that don't require signature/ proof of delivery.

I have a partner who has expressed a lot of interest in being an investor.

Does anyone know of a modular home (not mobile) company that does not have a crazy year plus lead time to delivery?

There have been many folks who have expressed interest in my rental properties that have screened themselves out after checking their FB accounts (i.e., folks who say they have no pets but post pictures of pitbulls chained up in the back yard and comments that puppies are available for only $600 a pup and, sadly, women who post pictures of themselves that appear to imply they charge by the hour).

I reached out to the owner of a local park and they expressed interest in us purchasing one or more homes in their park, and assisting us with renovating and renting them.