I paid a bit over $2k just to do the floor in my old 19c
i think it might be more than $3k to do floor and stringers.
Keep in in mind to do the full floor and stringers in a 19c the bulkhead and all the cabin/bunk mouldings all need to be cut out and then rebuilt. Huge job.
for a full rebuild and new outboard, it would be easy to sink well over $40k into one.