The basic difference between the M3W and all kit cars is ALL kit cars plummet in value the moment you take delivery. the time you spend away from your family putting the thing together is entirely a labor of love ( automotive love) its not profitable or logical.
I've done both and continue to do so. Working on cars can be more fun than driving them.
The Morgan 3W holds its value better than any production car on the planet. The months of whining on line about your trivial issues proves you should own BMWs or MBzs so every little thing that goes wrong with it gets you a loaner and a latte and an apology.
"Stiff upper lip" is a term the British came up with to cover their weather, and habit of open top motoring.
Seems you didn't do your homework.
Sell it or fix it. Working on cars is fun, breaking down is an experience.