I think you need to listen to the whole interview to understand how Wilder framed his targets.
He did say:
he wanted a squad of 23, 24
he said he wanted 1 maybe 2 centre halves, a midfielder, 2 wingers
He then went on, when asked about Stevens, to say if any of the listed players went they'd have to be replaced.
That clearly means, given Hussey, Wilson and Done are listed that he'll bring in a left back, another centre half and a striker.
Which means:
2 or 3 centre halves
left back
midfielder
2 wingers
striker
Whilst Brayford is in the 24, he is clearly happy to move him on and get more value for munneh.
To me his squad read:
G (2) Moore, Long
DR (2) Freeman, Brayford (replaced if sold)
DR (2) Lafferty, Hussey (replaced by Stevens and sold, interest already)
DC (5 or 6) Basham, Wright, O'Connor, New CB, New CB (possibly EEL), Wilson (replaced if sold, interest already)
MC (4) Fleck, Coutts, Carruthers, New CM
AM (2) Duffy, O'Shea (or other if rejects deal)
Winger (2)
CF (6) Sharp, Clarke, Evans, Hanson, Lavery, Done (replaced if sold, interest already)
Your 23 or 24 depends how many centre backs and perhaps the versatility of one to play right back if Brayford leaves.
Reed and Whiteman certain to go on loan. He mentioned Whiteman to League One.
Could be as many as 10 new faces if O'Shea says no and Brayford leaves as few as 7 if Brayford stays, O'Shea stays and he decideds a 6th centre half isn't needed.
Though he also said he'd keep sone money aside in case when they got back in training he felt they were still light. He mentioned some of the best deals - EEL, Lafferty - were done in August.