Where can i get steel tubing the cheapest?

Question

i looked at mcmaster and it was like 35 dollars per foot of 1 inch square tubing.

Answer 1

You need square?  Round is cheaper.  How thick?  What diameter?  What is it carrying, or what grade of steel do you need?  Figure out exactly what you need, then go shopping.

Answer 2

$35 per foot?? 1" square?? get out, is it gold plated?? there has to be a local supplier around you, I have two three in my area within 20 miles, they will cut to size for hauling, I don't know what gauge your wall thinkness is but that price is steep.