I went to Icon Collective right as Jauz was starting to blow up and I saw the dude producing on apple headphones all the time, and I know for a fact he did most of his mixing down on either apple headphones or his laptop speakers. Most of the people that are going to be listening to your music are either going to be listening to it on apple headphones or their laptop speakers anyways. Think about it. If your shit is bangin through laptop speakers and apple headphones, chances are it is going to sound pretty good on monitors. Just listen to your mix on as many different speakers as possible. I always listen to my music on my rokits, my laptop speakers, my apple headphones, AND my car stereo system. If it sounds good on all of them, that's when I know I'm set. trust me you don't need fancy studio monitors to get a clean mix down. When it comes to your low end, that's when a nice set of speakers come in handy, but if your car has a sub woofer and you know it pretty well you can definitely get by on just listening to your low end in your car
I went to an ableton class last night and Sage Armstrong was the producer/dj. He also does this. He said the exact same thing. So he will use his laptop speakers and see if he can get the bass sounding good on that because it will sound better on good speakers.
And the listen to it on different speakers is a great tip. It should sound good on all systems.