For this to be financially viable as an individual, you would need to focus on some niche or obsolete calibers or loading that no one else offers. You can't compete with commercial reloaders on the staple calibers.I'm actually thinking of getting an FFL as an ammunition manufacturer now- make the hobby pay for itself.
I have at least one friend who would come over and help.
I've always heard that you need liability insurance to the tune of a $1M policy. None of the major carriers will touch this. It's specialty insurance you have to get through the NRA if memory serves.
Here again, not a lawyer. Due diligence and all that.