Tanasha: maybe these will help
I would buy tall re-bar style garden stakes and spray paint them and then put them in the ground.
You cant spray paint the noodles, they will melt.
Skewer the noodles about 6” in on either side with the planted stakes.
You can wrap the whole assemble in crepe paper or other decorative things.
You can rent arches at party stores. Cheap and jut return after wedding.
Yes, it might be easier and more cost effective to rent a ready-made arch.
Also, you should not have to worry about the whole thing falling apart or crashing down due to flimsiness.