A quick question, how are you planning on using all these cards? Is this a big $10K one time purchase? The reason I'm asking is you may have a hard time cashing in $10K in cards on one purchase as some stores have limits on the numbers of cards they are willing to accept per transaction. You may want to check with Lowes in this case.

If you are just earning points and will be breaking up your purchases, you should be ok.