You guys can have 6 of these cars the same exact way have 3 in shoreside vale, 1 in Portland, and 2 or more if you store them in that garage in Staunton island but not sure if they despawn or not but have 2 just to be safe or you could make a separate game save to have more than 2 for that just in case
You guys can have 6 of these cars the same exact way have 3 in shoreside vale, 1 in Portland, and 2 or more if you store them in that garage in Staunton island but not sure if they despawn or not but have 2 just to be safe or you could make a separate game save to have more than 2 for that just in case