Complete waste of energy to show unfinished properties and worse, it could cause you to lose someone who may have actually bought the finished product.Perhaps with the demand you have there and the reputation you've built, you have a better opportunity to use that strategy to find renters.

To not make a big deal and lose rapport, i would thank them but tell them anything in the future will be rejected per the lease. 

Which lowered the price of the houses.For me as a buy and hold investor I would never want to invest in an area that I could potentially lose the ability to rent my house out. 

One of my life philosophies is that "Givers Gain and Takers Lose" When you enter a deal as a giver and the other side sees that, they are more inclined to be a giver too.  

If you lose money renting it out you are not making any income. 

There is no homestead exception applied...but I will also lose it in my current house if I rent it, so ...I'd like to go with the worse case scenario.

Make no mistake, if your parents default on the HELOC they will lose their home.

I would caution you that a Wholesaler that just "assigns" away contracts can be viewed as "predatory" and can lose their real estate license.

We have spent so much time and effort improving this building and I hate to lose all that we have gained in the past several years to this person. 

They all left without issue.The most recent one called me and screamed that he was going to take me to court and that I would lose my license.