Well, with a western rod you could just do a float and a nymph, but that is pretty limiting. And pretty short sighted.
With tenkara you could just dap, but that would be pretty short sighted as well.
But if you want fast easy 20' to 30' casts across seams, without mending, tenkara will get it done. If you want to clean up on pocket water and pull fish off the bottom of eddies, tenkara will get it done. If you euro nymph, swing wets, and throw an occasional dry, tenkara will get it done, and very well.
If you are exclusively into match-the-hatch with drys at 50', stick with western.
And, like Bob said, if you want to try it, save some money and buy one used.
Or, for around $200, you can get a new rod, line, tippet, and flies and be good to go.