Could get more seaworthy for the price.
Is this worth a look at ?
Your intended boat will certainly do IOW to Chichester but that can be a very nasty piece of water on even a half decent day. You should be looking for a Deep V Hull and jockeys. But I think you will struggle to get a modern boat with those attributes for 10 Grand.
However the engine size you have picked is more than adequate. Just needs a decent hull for the crazy sea in Hayling Bay. Especially off langstone and Chichester harbour entrance.