Recommend aps for this scenario?

I live in a house that is 2.5k sq ft. I have a wired ethernet connection from one corner to the other.

Would 1 or 2 hAP ax² be sufficient?

or would 1 or 2 hAP ax³ be ok?

I am new to this - is there anything else I need to consider?

I have 400mbps down/15mbps up if that helps.

Much appreciated!