Oh no, I don’t mean to put anyone off!
. That was a 4m warp, and the tea towels one was 3m. I find it’s the width more than the length which causes me issues, although it’s true that any tensioning issues will be compounded by longer warps.
Yes warping boards are expensive for what they are. If you’ve a handy friend, a sturdy frame and very well fitting sturdy dowels should be cheaper, yes. Mind, it’s easy enough to do a shorter, narrower warp just using a warping peg.