Installing the game on a couple computers that you own is fine, but if you only buy one copy of the game, playing them both at the same time would most likely be a violation of the TOS. That said, someone trying out a co-op session when they come over wouldn't be a big deal, IMO. Now if they wanted to come over every weekend for a couple months until they finish the game, they should get their own copy.
I am pretty sure I already got someone to kickstart.
I've told everyone I know personally who would be remotely be interested in RPGs about the kickstarter, but unfortunately that is a pretty small group.
