FWIW, I use a rifle case that comes with 2 latches and 2 locks, foam in the lid and thicker foam in the base. I modified it to carry everything I could possibly need for pool while I'm away from home. I traced out 5 butts and a jump cue butt with a sharpie, then cut them out making a wedge cut to accomodate all 6 butts in base foam. I had a seamstress make up a bag that will fit in the case that holds 8 shafts. I still have room for extra chalk, 2 small hand towels, a plastic (won't scratch your shafts) bridge head, a 5-cue Cue Claw, 3 pair of Fingers Slides (sold here on AZ by a member), various grit sand paper, a cueshark 8 in 1 PUP tool (also sold here on AZ by a member), and I attached my Original Cueshark 11 in 1 carrying case to the handle with zip ties.
Fully loaded it probably wieghs 15-20 lbs, but it's not like you're carrying it on a 20 mile forced march. You can get rifle cases through most sporting goods outfitters, and they can range in price from $50-$200 or so, the shaft bag cost me $40 to have made, so all in all I have about $115 + some of my time time tied up in my "custom case" that holds my most prized possesions. Good luck to you.
---Bill