Rents (dependent on the local area and subdivision, but for sake of this sample, let's use this #) = $1,700 to $2,000.3/2 mobile home vintage 1980s with 1200 sq ft in our area:  Cost $10,000 - 25,000.  

If it is a small enough house like this and I do have not much to do, I can just drop my 1hr exercise routine and 1hr lunch walk to do this.

They are eligible for ROFR only if other conditions are met(i.e paid on time, no damage, non-refundable fee per exercise of it).That way you'll get them to behave well, can price accordingly, and hopefully keep them around if they are good.

If you do not pay them they will exercise their right to foreclosure.

This last year was an exercise in "what not to do" LOL! 

However, I would like to put these "rules of thumbs" to test on a sample property and get your feedback.

(b) The failure of a limited liability company to observe formalities relating to the exercise of its powers or management of its activities and affairs is not a ground for imposing liability on a member or manager of the company for a debt, obligation or other liability of the company."

@Nadir M. many PMCs post samples of the management contracts on their websites.So, you can download a bunch, sort through them and then cut & paste what works for you.You will still NEED to have an experienced real estate attorney review for final approval to make sure its compliant with state and local statutes. 

Does anyone have a sample contract that should be used for this? 

Offer contract with an agent will be a standard vacant land OTP and they should provide you with a sample copy before you list and go over it all with you so there's no surprises.