They have limited funds and very emotional :) My lender is in #2 category ( we sat through a bit over half a dozen lenders within category #2) .

There is a discipline to this and needs to be done with caution.

A person's potential home isn't viewed as purely a commodity, it's an emotional reaction, e.g.: Will I like coming home to this place?

Of course, this is where they play into your emotions and pushing to up-sell their program, because making "professional decisions yields professional results."

Some folks place a really high emotional value on being debt-free.But no advantages mathematically to accelerate this loan (if it's long-term and fixed), especially since the mortgage interest on a rental is tax deductible. 

Take the emotion out of it.

The saying "it is about the journey not the destination" is so true and can only be experienced once you personally experience achieving a large goal.What I have found works for me is to work on my internal / emotional happiness and not just my bank account.We were literally talking about this last night with world famous people who are very wealthy.

Unfortunately MOST wholesalers only focus on the profits they make vs the expenses and tracking to make LEGIT business decisions from vs making decisions off of emotions. 

Re asses yourself, if they Purchased with another Agent either you didn’t do your Job right or you didn’t had that Rapport with client. there is bad Clients too, or another Agent showed them a Value you lacked.I know how frustrating it can be pouring your time & emotions in to the deal.learn from it.

This is risky if you aren’t disciplined in the payoff, but can be a good option to finance without interest.