Its costly to reload for everything you shoot. I have a few calibers that I never worked up a load for but I have the dies and all the components with the expectations of doing it when I get the time. Those guns dont get shot much.
I would put it away for a while, look for deals on ammo,reloading parts for it and if in another year or so you dont change your mind to reload it, then sell it.
I know nothing about 5.7. Maybe one day ?