Guarantee

Helen only wanted to know if her husband, whom she later came to know as Elias, is Trustworthy or not! At the very least if he became her and the kid's Guarantor she will be in less doubt than she was!

But failing to be a Guarantor didn't mean he was not trustworthy because he might just not be strong enough or maybe he had less experience that was required.

Benjamin Lincoln by the side has calmed down and his confidence was high. There was no way the boy would be up to the task! 

Apart from his personal reasons, he had informed his Guarantor that he will bring him a Talent Level individual.

There were not that many Guarantors and they didn't accept anyone, they chose carefully, especially someone that can be of help in the future, someone with potential. If a person has no potential then they reject them or demand heavy payments!