Yes, for weeks I didn't understand where Monet's conclusion that "you haven't established yourself as a man yet" was coming from.
He's enrolling part-time to get his bachelor's degree in "electronic engineering technology" at 30 years old. It's admirable that he's going to put the work in, but Monet is at a completely different place in her life and career. When Monet says, "he has a lot of potential and would be a good husband in 5 years", I see what she's saying. What she's saying is, she's successful professionally, 33, and wants a big family. If she wants a big family she's running out of time, she needs to start having the babies basically now, she can't wait 5 years until she's 38. It's just the realities of women's fertility. Meanwhile Vaughn wants/needs to put some work in on his career. He's not ready to lead a family yet.
Monet and Vaughn may have had compatible personality types but their expectations as to when they would start a family and/or what would be needed to start a family were not compatible. This is similar to how Jamie was brought up short to see that Doug was not as established in his career despite being older. Meanwhile Jason was worried about Cortney's student loans. It's not fair to say someone is a gold-digger or marrying for money when they worry about the other one's financial state. The financials determine when/how you can start a family.