Yeah, we have no idea. They have a guy who basically lives at their property whose only job is to take care of the boat. That would *ahem* be a bit beyond our means here in San Diego!
Plan for a slip would be to get on a wait list here in SD & then move it from MX once it's available.
Bow thruster would sure be nice to have... ~$50k?
We have a trip planned to MX in early Feb, so will take a close look then. I promise more pics!
I suspect the Bow Thruster would be in the $15K-$25K range assuming you are talking electric. Given it is a heavy boat with big props and rudder I suspect you will find it OK without a thruster, especially for our typical use in SD bay and area. It would be nice to have a thruster in Avalon while picking up a mooring but generally not required. I don't have a thruster on my 48LRC but I would not turn one down if given to me!
I think you will find your maintenance cost to be roughly 2.53x your current cost. But that is after you fix/replace everything that needs it (below)
Just as a reference, when I purchased my 48LRC it was "well maintained". I spent about $25K with the yard just to get it to where I felt I could move it south from SF Bay area to San Diego. About $10K of this was just taking out the old stabilizers and glassing the hull openings. I could have done repairs but that was at least $20K and much of the system would still be 45 years old.I can tell you that the stabilizers on the Hatteras Motoryachts are much more appreciated than on the LRC series. Given the MY are faster they also benefit more but it is also the differences in the hull design. The LRC series is just generally more stable (based on my own subjective feel of the ride).
Some of the items you probably will want/need to attend to (outside of the engine room & stabilizers which either can be very expensive if major issues are found or just moderately so). All of this assumes you are doing most of the work. Otherwise double or triple the estimates as a rough budget.
Heads are probably old and if original galley maid units very loud. If DYI you are looking at about $1.5K each including new sanitation hose
Electronics probably are ancient. Assuming you go with some middle of the road options I would budget $15-20K.
Batteries: Most likely these are end of life. If you plan to use this boat often at anchor you should consider this a good time to update to Lithium. It will cost you 2-4x the cost of just putting in more lead batts but SO MUCH better and less to worry about (Both in terms of maintaining them, over discharging and time to charge (less genset run time). They will also outlive traditional batteries unless you are better than most about how you use them and how you maintain them. I am not in that category so I love knowing I am unlikely to kill my LiPo batteries if I run them low or don't charge them fully.
If you do change batteries (and maybe even if you don't) you might need new
charger/inverter. A challenging but fun for me DYI project but I work in technology. But not beyond the reach of most experienced boaters, especially with some help from others with more experience. Add another $3K+/- for this (it is more than just the cost of the chg/inv.).
Genset: Speaking of which, this will be a large variable depending upon whether you can use what is there, make some repairs or have to go new. I don't have a guess on this one.
HVAC-If needed (not so much in SoCal) the original systems are certainly at/near end of life. Fortunately on my 1976 Hatteras I still have all 4 of the original units (split systems) and they all work. But I know it is an item that should be replaces. To go back to the original split system the cost is around $35K. I am pretty sure when the time comes I will go with self contained units as long as I can find the space to mount them. I think I can do this for probably $3K avg x 4 so about 1/3 of the cost of the split systems. The cabin noise MAY be a bit louder than a new split system but these self contained systems are much easier to replace next time around and cost is much lower. Around $2.5K/unit and it becomes more or less a drop in replacement process.
So if you get the engines running fine and the stabilizers are not in bad shape you might be looking at a minimum additional cost of $25-$50K to get it ready for the family. Lots of other "small systems" such as fresh water pumps, bilge pumps, lighting, etc. that can add up but no really large single item. You could see this surge to $100K+ fairly easily but you would have a fantastic boat if that is what you are seeking. As long as you are prepared to do the work (and write the checks) and have the time/budget it could be a very rewarding project.
Once you and someone who knows Hatteras gets on board you will be able to dial in the estimate.