I am not paid in anyway (I wish) but there's a brand called Command that makes hooks with adhesives for hanging things up. They have ones specifically for paintings that distribute a lot of wait across multiple hanging points. That might be worth checking out! The adhesive also comes off of the wall without any damage. You pull down on the strip and it dislodges the glue via stretching or whatever so it pulls it off without messing with the wall. At least from personal experience with the ones I've used and I've used the painting ones to hang an 8lb piece of shit.