What is your objective? What are you attempting to solve, achive etc?
Keep in mind a frame that holds your plants, but is not secure in any fashion, may present issues if bumped. (tops pull back through, break, get cut off etc.)
Fishing line, might not be the better idea. (unless its around 60lb test or stronger, the diameter of line is too thin and yes, will cut into the stem) The clear line may also cause burning from a magnification effect (not sure on that one).
Not said to suggest following the trends or anything, but most of whats used today (see other threads here at RIU) works well. (rubber coated fence purchased at most harware stores is a cheap option with some great benifits, and would likely suit you too)
GL, dont hesitate to do a bit of research! (other than the project itself)
Woodsmantoker~