Crib in master bedroom - When should we get the crib?

RR • Together since 2009 | Married since 2014 | 3 M/C`s | MTHFR | Rainbow baby born 07/02/17💗 #2 Due 12/21/20!!
I'm a little under 16 weeks and my husband and I were looking at cribs. Wondering when everyone got their cribs. We're thinking about waiting until 32 weeks but maybe earlier since it'll be in the room?