Epic Flying mounts work perfectly fine. I tested them extensively on the PTR with no issues whatsover.

I just have to teach myself to not use spacebar except to go straight up, then hit my follow key again. I fly using the wasd and my mouse, no space bar.

Crusader Aura only works if you are on follow, I had this issue also and it shits me. Dont roll a Paladin for the Crusader Aura, unless he is on follow thats all I can say. It sometimes works briefly in PvP but its not the awesome 'catch up to anyone' ability it sounds like on paper.

Just do every quest you possible can, make use of the AH, sell every weapon you pickup, dont buy anything. I doubt you'll have 30k gold (you really need 6k gold to get your epic flyers) by 70 but you'll be maybe half way.

You should be able to do Skettis Bombing, BE Bombing, Escort the Scout, Banish Demons, Capture Aether Rays, and 5x Simon Says. If you cant be fucked with escort or Simon Says, thats still 55g per character per day.

Also make use of your 5 box, do instances, sell cloth, sell large prismatics (25g on my server last I checked). Hell if you can get a heroic down really nicely, sell Nethers for 100g or whatever.

Have a bank alt you send everything too, run auctioneer advanced on that character and sell everything. On my server for some absurd reason wool sells for 5g a stack, go and find something wierd that you can farm en'masse.

Go do Strat runs in 15m, over and over.