Yep it's definitely an issue. However, it's something that tons of guys have to go through, as most players spend at least a year in the AHL. They do get per diems and apartments/houses (the latter if they're married), travel, plus other expenses paid for. Not that it comes out to a huge amount, but it basically makes is so that you don't have to spend much if any of your actual salary.
Again, though--if you want to make the big bucks then you have to tough out that first year or two. If he spent this year getting himself ready and even seeing some NHL games, he could have conceivably spent the entirety of next season in the NHL where he would have made up all his lost money for this season a couple times over. Now, he may have just hit the reset button for next season. Maybe not. We'll see.