Looks like you have plenty of room, and you definitely have plenty of light, so considering the size of your 5 tough survivors (not all that big yet), I'd say wait on the White Rhinos and let those survivors get bigger. Unless you're out of pot, in which case, I'd probably flower immediately. But that's just me; I hate being without pot.

Looks very nice, btw! And that thing you thought might be the ball of a male - just looks like a calyx to me, not necessarily a male, just an indicator that that plant is sexually mature now and could be flowered anytime. It still could be a male though. That's another advantage to waiting on the Rhinos to arrive too - if you're patient, the preflowers should eventually spit out hairs or bananas, and then you'll know, without force flowering or flowering just one branch or flowering clones or whatever. I usually just wait until the preflowers tell me the sex, personally, as I am more lazy than I am impatient.