I went DIY with two other guys. Biggest cost was the float plane. And it didn't help that the five places we had picked out already had camps. We weren't about to set up near anyone else so keep going and going and going, then eventually just landed in some random area. That didn't pan out, so after a few days had the plane pick us up and relocate us. Expensive move, but worth it.
Look at units, success rates, aerial imagery, topos, call wildlife biologists, then be flexible.
Are you okay with dropping $8k and not getting one? It's possible. Or is it worth the $15k and most likely getting one?