I reccomend to download costum content world(s). there some great stuff out there and they are free.
The CAW is a nice idea but I can tell you that it is very time consuming. It takes some time to practice to get a decent playable world. If you have the time go ahead..
As for Hidden Springs / Midnight Hollow: MH comes with premium content - the savvy seller collection which is practically a cash register. I think it's cool (though I didn't get MH yet). HS - I think there is still a sale in Origin so you could by HS together with Monte Vista at half price.
