I thought I saw some vague mention regarding alts and garrison/followers, making certain parts of them a bit more account-wide. Like purchasing the blueprints once, then only needing to pay the resource/gold cost when you actually build the building, or the followers that you purchase for gold/apexis, etc.
But, I haven't seen anything regarding that in recent blue posts over the 6.1 PTR and such, so I guess it isn't happening.
Which sucks, because those blueprints get pricey on alts really quick. Make sure you pick the proper 2 Large and 2 Medium Tier 2 plans you can get for free from questing, to save you the 1500/1000G per.