I see how pressed for time you are. Have you or her considered asking another of your group to help. Even just 1/2 an hour that someone shows up early or stays late after the game should be helpful and could.get at least one or two of those card done each game. As for needing to update every level or even every game when new loot us available, well that is what pencile is for. And each level, you can just skip the all new sheet and then cards to just updating the few spots on the cards.
I don't know how much info you expect on each card but I honestly have a hard time understanding how.hard it could be to transfer the info over from sheet to cards. I guess the card with skills would take up the most space and time but maybe you can cut that down by only listing the skills with ranks in them. Maybe list the others on the back of the same card so she can still see what ability modifier to use for untrained skills.
-One card for defense only requires 7 lines: AC x 3 for normal, flat, touch; 3 saving throws;HP. -One card for offense with 3 to 6 weapon attacks.
-One card for miscellaneous info: age, diety, color for hair, eyes, skin, height, weight, how many levels of each class, initiative modifier and concentration check modifier for casting.
-one card for feats and traits with book page number references.
-I could see spells needing 1 card each (maybe a separate stack/size) or group all spells of the same level together with book page references.
-One card for gear that require body slots, the other side for stuff in the backpack.
This really seems to me like it would take only a little time more than to fill out a sheet.
I have seen index cards sold in multi color packs. Instead of a pack of 100 white, something like 20 each of five different colors. Again, time to search several stationary/office supply stores might nit be in your schedule but you can ask your group to keep a lookout for such. Even if 5 people.bring in a set, index cards are not super expensive and sinc you all love to game so much, they will get used over tim
That 6 page character sheet. Have you considered get each page printed on different color? Stack them so all that needs to be done is flip the page to the right color. I wanted a cheet sheet with all the actions in the game on a chart breaking them down to full, standard, move, swift, immediate, miscellaneous printed on a color page(to stick out from typically white character sheets) and the offcice supply stores of both Kinkos and Staples were happy to do such for me, each had many colors to choose from also. I think each color page was at most a dollar printed, and after the first, photocopying on color paper was cheaper.