I noticed this is your first post here in the forum. Do you have any experience with boats at all? There is support for “boat is too big, boat is too small” arguments wherever one discusses boat sizes. Yes, larger boats have higher yearly costs than smaller boats even if both are either just docked or for that matter stored on the hard
Back to you question, other than asking if a particular boat in a particular size is fine for living onboard. So many folks look at shinny boats pictures shown in the numerous boating/sailing magazines and relish the thought of living on one. Then there is the real life factor.
Living on a boat requires a special temperament, similar to trying to live, that includes storing all your belongings in a room about the size of a bathroom with limited accommodations such as running water
, washer/dryer, heat, electricity unless you’re tied to dock
. But then your costs soar.
Now getting back to boat sizes, at one time boat lengths were measured from the bow to the stern. Today most boats are measured from the bow pulpit to the swim platform which in some cases can effectively remove upwards to 4 feet of the advertised length so I really don't know the real length of the boat in reference. If you carefully analyze the actual living space, you will see that even a 39 foot boat provides far less living space than a very small apartment.
I would never ever think of full time living on my boat even though it has great accommodations.