Bad idea?

One more endorsement for Blue Jeans cables. There cables have proven a great addition in my system.

Pine Tree Audio. 100 or less.  I have the Rainbow Ribbon

If you only need 4 foot cables, I don't see why not.  Seems like a good idea.  From the other posts, there are lots of good options and it is easy and clean to have them terminated by the pros.  My buddy terminated his cables with good connectors and shrink wrap and they look just like from a factory.  I personally don't care for bare wire.  Do you have a speaker cable picked out yet?  I keep think about new cables and was told DH labs T-14 is good, but I have not tried it. 

https://silversonic.com/products/bulk-cable/

@OP If you can't solder, buy cables in the correct length instead. In fact, that is the better way to go anyway.

Many good choices here, Cullen, Pine Tree.   You might also check out Ice Age Audio up in Traverse City, MI

My next purchase will be @daledeee1's suggestion ... full set-up for $110  ... 

https://sites.google.com/view/pine-tree-audio/speaker-cables/speaker-cables/shadow-ribbon