Flat to round

she says just double it for the round but i seem to remember you cant do it that way. someone said basicall, rows 1 and 3 are just knit and purl rows. so knit the knit and purl the purl. do i do row 1 as they say then after that when i get to row 1 knit the knit and purl the purl?
also one place said to cast on 252 stitches instead of 256 this avoids the double ribbing that would occur because of knitting in the round. will that work out right

one more thing it asks for 650 yards of DK weight. my daughter bought patons calssic wool roving and only 3 balls. 120yard per ball.

should i even bother to try and make it or is the wool and patter not suited for each other

I think you would have enough yarn if you use a larger needle, maybe an 11 or 13 instead of the size 10/6mm; you’ll need less stitches and that makes the yarn go further, and you don’t need one that’s 60" long, a 32" or so will work just fine. Yeah, do 1 and 3 with opposite stitches and also follow the row from the end of it to the beginning.

She doesn’t say to double it - that would be if you want to knit it flat, you make 2 pieces. As written, the 256 sts (128 twice) would be 73" around. If you don’t want it that large, figure out how big you want it (50" would be big enough to twist it around twice) and multiply that times your sts per inch on the larger needles, then adjust so you get a stitch count that’s a multiple of 7 plus 2 sts.