I'm a Brazillian w/ a bad internet, so I haven't played much of PA, but my friend brought PA and his internet is even worse than mine, but he have a 8G of memory on his PC (while I have only 4), so he can make local server w/out problem... So can I play w/ him while he use the local server to (try to) kill the lag?
If his internet is sort of bad, there are mixed chances they might also lag as badly. Depends if it runs through the local providers entirely, or ping off something more distant.
To host a server requires an enormous amount of upload speed, so you'd need to be in a LAN to see any benefit. Running a VPN with hamachi won't work very well unless ISPs in brazil give decent upload rates (they don't in Canada)
Good point. Is Hamachi P2P or server based? Edit: nixtempestas also raises a good point, in that the upload requirements likely make the question moot.