Things cost money, we all know this. But some things cost other than money (if that makes any sense). What I mean is, some things cost money, other things cost time, or effort, or even friends. What's the most costly thing you have? My truck is cost me the most. Sure it took money, but I had to work all summer my senior year to get it. It cost me that last summer with my friends. Something no money in the world will ever be able to replace.
well, in that category, for me , it'd be Croatia Bronies. Whole effort of creating local bronies group, and organizing everything, till the point that group is on their feets. I've made lot of friends, great memories and great time in the process.
Moving out of home to a new city. It has and still is costing a lot of money, it's cost friends (I don't know many people here), it's cost me time and its cost me the security I had living with my parents. No regrets though, the best things always cost the most.