Catch a Sale price at JoAnns Fabrics for Royalty Black Velevet and get 4 yards for $7.50 yd. While it may actually be a bit more than the Felt Tape, the visual quality and feel is worth much more. Felt Tape is crap by comparison. (...or course if wastage is a buggin' issue with you, you'll look down your nose at this option...)
But no matter what, if you want a easy time of it, be absolutely certain you request that the BOC comes in a Roll....not folded. I'm not even sure Rosebrand offers that choice...but Carl's Place does, and Carl's will cut the BOC to your requested size (78" wide would be best) to minimize shipping costs in a "Rolled" configuration. Call and ask for Carl himself and tell him that MississippiMan sez to do you a "solid". He might just listen.
I would suggest that going cheap on boarder tape is a big mistake. The difference between felt and velvet tape is amazing. Velvet tape is available on Ebay and the extra $20 will really be well spent. I have had experience with both and have replaced the felt with velvet.