Since i'm screen height but have an AM its taken about 2 months (if I had worked on it every day cutting and heat gunning it down to fit me perfectly) but I could probably get an ATA done in a week, if with enough clamps and all the snaps and stuff in possession.
The e6000 cure time, lack of many clamps and magnets, and waiting for things to be delivered is where the bulk of the time comes from.