In the data field I've gone back monthes later to see that tie wraps with screw hole tabs will stress-crack after some some exposure, especially if there are 5 or 6 cables hanging from them. We've tried all different brands of ties and after a while they still get brittle.

You might try bigger (wider) staples and velcro tie straps if you think you'll need to go back and add/delete/upgrade cabling later. It's more expensive, but if it's YOUR project.....

You've got a crawlspace ? You're a lucky person. What about big conduit with strings left inside for future pulls ? If it's a job you can sell the advantages to the customer. Rigid PVC conduit is cheap.