I want to knit the Hiking vest in the current issue of Knit 'N Style. The yarn the sample is made out of is wayyyyyyy out of my budget. ($38) a skein. That yarn is 3-3.5 sts /in. I think that is a bulky weight. The bamboo yarn I want to use is a Dk weight. Could I just double it? What if I wanted to use a worsted weight yarn? Or any suggestions on a yarn that isn’t so pricey that would work well? I am still a little confused on how guage works with yarn type as it relates to he pattern. Here is the link for the photo of the project.