Whats the limit of what your allowed to have in your home in the states?
Is it case by case or is there a limit in calibre or anything?
Like can you have an actual machine gun? RPG?
No explosives our rockets or anything... Lol
The rest is a state by state basis. In most states though:
Full auto is highly regulated and can be had after a ton of paperwork and like $10,000+ just for the gun. Silencers are regulated so there is extra paperwork but they are under $1000 usually. Short barrel rifles/shotguns just needs some extra paperwork too. Caliber is limited to .50cal max with no restrictions under that.
Other than that there is no limit to the amount of guns one can have, as long as you have the money to buy them. I think some states limit how often you can purchase then but the limit is something like 3 per month just to prevent distributing then without a license.