If the bait tying machine is the little square orange or yellow block one, it is not worth buying. I had two friends that swore by theirs until I showed them I could out tie both of them together by hand. I will admit that if your eggs are not loose and are not cured it is a big mess but the machine will not make it less of a mess.
I rarely use any eggs anymore but on messy skein I have found that curing them in borax will keep the mess to a minimum.
To speed tie your eggs - layout 25 pieces of netting on a flat surface, place eggs on the netting for all 25, put your spider thread spool in a small bottle (stops it from rolling all over), take the tag end of the spider thread in one hand (I hold it with my pinkie), pick up one of the eggs and netting, twist it and grab the spider thread and wrap 2X3 wraps and tighten and snap. Cut and trim all the bags after you're done twisting them all up. Your hands only get messy in the twisting stage, and your job will go quicker than tying one at a time.
25 bags takes me 30 mins and last for a morning fish.