This is a really good article. It reminds me of when I was starting up my real estate business. For real estate transactions, there are a ridiculous amount of moving parts. For real estate investors that are testing all boundaries of how transactions are done, you really need an experienced, knowledgeable team to help guide you through everything.
I churned through 6 title companies, 10 different real estate agents, more than 15 different private investors and more contractors than I care to remember in a 3 year period before I formed a great, reliable team.
You won't really know how good a co-founder is until you "try him out." The best point about this article is to establish a steady supply of talented, entrepreneurial people and keep trying out co-founders (or replace whatever position you need) until you find a great match.