Bowgunning isn't really worth it early on. It doesn't do much damage without elemental and/or status shots, and you can't get the best gun parts for those until later. Plus, it's expensive, requiring separate armour and buying so much ammo, so it can be a difficult weapon to manage until later when the money starts flowing in. It is also best used as a support weapon when playing with three other people.
Just this gunner's humble opinion.