Transport? We are talking about 23 ft boat. What is a length of the mast? It is 27-28 ft at most. It shouldn’t weight more than 50 lbs. Beach catamaran sailors step such masts solo for a day sail.
Go to Home deport. Buy 2 2x4 longest they have, I guess it would be 8 ft, longer is better. Buy 1(one) bolt and two washers. Make X-frame with very short V on top and long legs. Buy cheapest ropes they have.
Total investment – 30 backs. At most.
Now, Lash legs of X-frame to the toerail. Lift the X-frame so it stand-up with top V directly above a hole in cabin top for a mast. Use ropes as shrouds to keep X frame in place. Lift and rest a mast on top “V” of X frame. It’s 50 lbs, one person should be able to lift one end. Use mainsheet to position mast and lower it into hole. Voila…
Honestly speaking, one person should be able just slide the mast into hole without any help of additional devices on 23 ft boat. I believe it is exactly a reason why it is keel stepped mast. It makes much easier to step without assistance. Just slide it into hole; cabin top will support it in up position so you can walk around and connect shrouds and stays….
Besides, boat documentation should provide very detailed instruction how to do it with least effort.
There is very active O-day owners association, they should have all answers