You have a lot of things competing here. Building a custom hull would not be to err on the side of affordable. It means you'll assemble the rest of the boat from parts
and pay a premium even if you do all the assembly work you won't save money
. If on a budget
I would never build your own boat let alone hire it done if saving money
is a consideration let alone a requirement.
I wouldn't go for a motorsailor. It's the worst of all worlds. They sail almost always poorly but still require all the rigging
. Being light weight does not reduce operating costs at least just on it's own. Using wood anything won't reduce maintenance
costs either. Maintenance is not low on any boat and dependent on climate greatly.
I think you would do better with a used power cat. It's the only thing I know of with 6 - 4 headroom
everyplace. They haul more stuff and have more square footage. With two smaller engines you might be more economical. Sailing gear
buys a whole lot of fuel
Bells and whistles can come in many forms. Hot water
? Air Conditioning
? Hydraulic crane for the dinghy
or HAM radio
? TV? TV with satellite
You have not indicated the type of travel you plan on either. If you desire to cover long distances with ocean passages you might have blown the budget
. Your list of requirements really needs more work and next to it would be a more refined list of expectations with a budget.The budget needs to consider purchase
costs, operation costs, and other expenses to compute to a number that leads you to a total boat budget. In the bigger picture the cost of the boat is the only easy computation but only after all the rest are added up.