The most common and basic costume is simply a black top with the deaths head symbol spray painted onto it, a set of black leather trousers, boots and a black leather belt if not utility belts. The next costume is the same, just with a leather or khaki overcoat used to conceal his weapons not to mention the skull head symbol. The costume used in the routine continuity is a much more generic superhero costume, using a simple colour scheme and utilities including Nick Fury SHIELD uniform.
On several occasions, Punisher is known to combine his clothing, using his chest armor and will go out to buy clothing if he feels the need to go undercover.
Frank Castle is famous to possess secluded and safe-houses acres of land throughout nyc and New York State. He retains his unlimited arsenal of weapons and his vehicles locked up in these places when he doesn't use them to sleep in, study the files on his aims, for target practice or as workshops for repairs and modifications. He pays the lease from the event of crime syndicates he has shut down and utilizes a huge array of identifications.
Files collect on offenders and writes his experiences into his celebrated War Journal. Whatever he can not use and resides as a minimalist is disposed of by him. He was able to keep pictures of his family, but not anymore since he discovers him distracts from his assignments at hand. He flung them off the Brooklyn Bridge at the commencement of his war.