I found his logic persuasive myself, but it would concern me to have so many eggs in one basket when conventional wisdom tells us to have financial diversification.

I was simply asking a quick question on a forum, I did not know I would be graded as if I were writing an essay.

The question was; if I were to locate the perfect candidate, how would I go about approaching them in the most polite, professional, but also firm and persuasive manner possible?

There is a lot to read between the lines and it really comes down to your effectiveness in communication and persuasion:1) Accepting Your Own Mistakes: Start an honest discussion, maybe accepting some responsibility at first for whatever you may have done that caused a hiccup in the project (no matter how small or insignificant it is in comparison to their delays or mistakes). 2) Offering Help: Then ask 'What can I do to help out?'

Rather than hide it you have taken action to correct it although it is costing you money.Salesmen can be very persuasive, especially when they are licensed and hence regarded as experts.

This covers "Seller Financing", as well as "Private Lending".I'm writing an argumentative essay, and thats a great topic suggestion.

Well that post came out looking like an essay. 

It is quite fortunate for you that your SO needed convincing because the gurus are quite persuasive and had you not been looking for justification you would probably be shelling out loads of cash on the up-sales.Now that you're here, you know better and are well on your way.

I have been of that persuasion all my career and it has worked really well.

They are directing the narrative and how things play out over time in the bigger picture through influence, propaganda, persuasion and even force.