D&D 5E (2014) Leomund's Tiny Hut -- how to lower casting time?

[TraigosOde]

Contingency

I suppose you could cast contingency and let the triggering action be something like saying "I wish I were surrounded by Leomund's Tiny Hut."

That would appear to be legal as the target for Leomund's Tiny Hit is Self.

 

[Winterfell]

Sounds like you want to start an arms race with your DM, good luck with that!

Damn convenient those falling rocks...