that is a very tempting price for backing-width fabric.
Kona solids and those from Connecting Threads don't usually run.
You'd have to piece the back, but they are an alternative.
You'd spend more $$$ because they come in standard widths.
i agree with those who recommend multiple pre-washes; also agree it should be done in the hottest water setting your washer offers.
Color Catchers come in very handy when pre-washing - especially for reds, which seem to run more often than just about any other color. They're re-usable. However, I'd recommend throwing in a new one with each pre-wash. Repeat until the Color Catcher stays white. Save the used catchers for future use with regular laundry.
If you settle on the red you've shown us, I hope you'll come back to let us know how it performed in the pre-wash.
I'm sure lots of us would like to know.
