Last bit, landscapes. You can do them without a tripod, depending on your style, but if you are going to end up being rather serious about them you should definitely consider a good quality tripod, which will run you $500-600 and up. But, if you just sorta have an interest, leave that for another time. Also get a cable release and learn about mirror lockup.I'm curious why folks spend that kind of money on a tripod for stills. That's almost as much as I paid for my video tripod with dual handles and a nice fluid head, all of which is massive overkill if you don't need smooth pans and tilts while the camera is live. I'm just curious, speaking as someone who has never shot stills with a tripod that costs more than about forty bucks.
Weight and stability.