Unless you need fancy stitches or zigzag my go to is a vintage Singer featherweight. They are solid metal and are gear driven so no electronics to mess up when away from home. The machine itself only weighs 10# cases add additional weight. SewEzy sells a traveling portable table with wheels you can get an insert for to fit the featherweight. Love my fancy Berninas but the quality straight stitch of a featherweight can equal it any day of the week.