Good on you dreamer90.
Informative articles here; 15hp outboard is way too big. 6-8hp more usual.
www.mysailing.com.au/arabesque-a-hood-23/www.seabreeze.com.au/forums/Sailing/General/Hood-23s?page=1Many other Hood 23 articles on line obviously.
The deck issues UncleBob alluded to were the result of end grain balsa used in the deck as the core between two grp layers. Makes a stiff and light deck when done right. Search this forum for end grain balsa issues. If fittings are bolted through the deck and not sealed properly water will ingress and delaminate the deck making it soft and spongy.
So if you have foam cores then these might be better than end grain balsa as long as they haven't been compromised by poor sealing - suggest check and rectify all fittings so that the foam core panels don't deteriorate.
Assume you have insurance sorted - search this forum for suggestions.
How old is the standing rigging?
See recent posts by Cabron on his Cole 23 excellent paint refurb.