Nickel 200 is a ferromagnetic, commercially pure (99.6%) wrought Nickel with good mechanical properties over a wide range of temperatures, high ductility, and excellent resistance to many corrosives (in particular hydroxides). It has roughly the strength of mild steel when annealed and can provide higher strength levels when in the "as rolled" condition. One factor that affect resistance is the diameter of the coil,the thinner the wire (higher gauge number), the higher the resistance per foot. The thicker the wire (lower gauge number), the lower the resistance.
With these prebuilt coil, it will make DIY easier, there are resistances for your choice.