Should I be using magician rope for Professor's Nightmare routine ? or are there any cheaper alternative available like buying some other rope from local hardware store ?

25' Rope White Uday is decently priced at www.thelittlemagicshop.com

so I think that is my best option

While the white rope from Uday is decent, I personally like using the Elite Rope from Camirand Academy... It's got a nice thickness to it & the quality is great... I use it for my stage shows ^_^ You might want to check that out besides the one from Uday, unless price is a big factor.

Thanks for the information on Elite Rope. For a casual performer like me ( performing for friends & family) Uday rope should be fine.