I like this idea, but the problem that arises with this is how big the addon is, it might not be a problem for older player as they will just download the single new addon, but the new players joining will have to download everything and some people don't have 10-30 minutes to download a server they may or may not play on. I do like to think that most Gmod servers have a large download and wouldn't mind this as I use to play on a server with a lot of content like hats and stuff, but some people may have a problem waiting for the content to download. I do think if the server is worth the wait they wouldn't mind the download (we are in the top 10 best darkrp servers). The second problem would be balancing it so its not broken as hell and ruins the economy, but also not shit where people dont play it and its a useless addon.