Q8 Final Table Push (pf) 64 players (live charity) - Please advise

[intheflatfield]

This hand occured earlier this week at said tourny.

Note - only 1 significant prize (vegas vacation valued around 2k)

Blinds are 15 mins at this point and are $20k / 40k by FT

I am roughly tied for chip lead w/ 100k

Hero (button) 100k
SB 95k
BB 105k
utg 20k
utg+1 40k

folded to me:

(Reads - SB is ABC but thinking player (dangerous). BB is weak tight nit, but decent instincts (elderly FWIW))

I push - SB tanks then finally folds. BB tanks forever.. and eventually calls my all-in. AK - board blanks - to the rail..

I feel as though this was a good push against 2 unk hands at this point, but I had 2 more hands before blinds came around. Calling was not an option (obv). My thinking was that with FE involved this was standard, but I was criticized by a buddy of mine who was railing.

Standard? or should I have waited? Please advise..