You WILL want an ohm meter, and a very expensive one if you want to go below one ohm. Above that, an MVP2 or similar unit with an ohm meter will do just fine.
I bought a Kayfun clone today. It's a rebuildable tank atty. (RTA). Bought it because you hear so much about them. Kayfun this, and Kayfun that, and I did blah blah blah with my Kayfun.
Well, if you're new to it, Kayfun is anything BUT fun. The clones (and that's what you're gonna get, unless you wanna spend $100+ on a stinking tank) have teeny tiny screws, and the heads don't grip wire well. I was concerned more about getting a cotton wick right than the wire. Wrap it, fight with the screws, find out your coil is like 3.9 ohms, fight some more, ad nauseum.
However, after re-doing the coil 3 times, and the wick twice, I got a very working Kayfun. Now, I can start enjoying building.