Hi All Yes the Ross 780's mk3 is a lovely yacht I agree. Those worried about where to park a trailer sailer there are actually plenty of choices for the slightly inventive.
The usual Australian currency of a carton or two of beer goes a long way towards securing safe storage whilst you are off cruising in a wide range of different options as varied as from transport storage yards to farmers hardstanding areas.
Out of peak season most caravan parks will let you park up in a remote corner for a very small fee for those less brazen than just asking when seeing something suitable.
As for the costs of towing I have found they are not that much more than just driving there anyway with the likely increase in fuel consumption ranging from 40-70 percent in my experience.
Generally trailable yachts cost less to tow for equivilent size and weight than caravans due to their small front profile cutting through the air.
I agree if you live a long way away from your desired cruising location and only wish to sail for 7-10 days then perhaps chartering is a feasible alternative.
If happy to almost always cruise the same or close by locations then perhaps a trailable cruising yacht isn't your best choice.
Even in that case if not living on a small block then there are still advantages in taking your yacht home for maintenance, storage and pre trip preparation and provisioning if you are a multi day cruiser as distinct from a day sailer or around the cans racer.
Yes if accommodating a family for cruising then a trailer sailer is generally too small for most.
Finally rigging and launching times are often a result of design and appropriate systems as these can turn a 2-3 hour exercise into a 30-40 minute one even on a very large trailer sailer. My own yacht has a superb manufacturer built system that allows me to solo rig it and remains insitu allowing one person on water lowering whilst underway for bridge and powerline transits