Who Dey, not a good move IMO.
You now have 300-650k to spend on 3 quality players, and 3 good bench players.
That is about 800k.
Also, you missed that center's training peak by about 2 years. Two seasons earlier for that deal, and it would have been great. But you bought only a solid center for 1m, that is not so trainable now.
Those are my two cents. OFC, I don't have the best opinion out there, but in BB, depth is key.