Sorry to see you stuck in this position. My best advice is to go to your local fish store and buy a ton of live Rock that is already cured. Put it in your display tank and monitor it very closely, preparing to do water changes every day if necessary. Since the Rock is cured if you buy enough of it it should save you a cycle. I'm talking 50lbs or so which will be kind of expensive. When your fish show up if your ammonia hasn't risen you can try to put the fish in but monitor closely.
If it works out OK then cure your SWF.com rock in your QT. Or better yet get a second QT. One for rock curing and one for Fish if your ammonia starts to spike in the DT.
Your 2 tangs will be a problem no matter what. Keep them separated with eggcrate or something until you can find a home for at least one of them, preferrebly both.
The best solution is give the fish to someone else or the LFS but if you are up for spending some money using cured rock might save you.