Board Thread:Questions and Answers/@comment-96.48.230.104-20150210084429/@comment-50.194.17.38-20150720081832

I think the author foreshadowed the success of asuna and kiritos relationship in the Excalibur arc while talking to the shop keeper. He described the way he and his wife met in game (like kirito and asuna) and the hardships they faced with her living in America and then eventually hi  falling into the trap of SAO (kirito and asuna have obviously tackled more together, but in this sense I believe it is significant) and they are now living happily supporting each other.

As for whether or not kirito and asuna will be secure economically once they are married; just look at the series itself, it's entirety is based off the success of a video game invention. It makes enough money world wide that players of ggo would dedicate all their time to make decent livings IRL. Kirito project of hazing the line between the virtual and the real would be quite a hit with the die hard players, or any player that would like to interact with characters and objects from the games in the real world. And as the inventor of this technology kirito would make plenty of money, perhaps even enough to put asunas rich bitch mother to shame.