I'm sure there will be different perspectives on this, but I think you could make an argument for a Ford xflow based 4/4 - 1969 or early 1970s say.
Parts are plentiful for the 1600 Xflow engine (eg Burton Power), and the Weber DGV 32/36 carburettor is easy to tune. There are no electronics and no ECU to worry about. If you choose to MOT it, then there are no emissions to worry about. And the tax is zero. You can fit a simple electronic ignition if you don't want to faff about with points etc (eg Acuspark or Lumenition). You can fit an electrical fuel pump if you wish to. There are no fancy PCBs in the electrical wiring - mind you any car from the that era is likely to have some electrical gremlins but again, the Lucas parts can still be obtained.The running gear and suspension are simply maintained with a spanner and screwdriver set. Tthe brakes are Girling based so again readily available. People like Melvyn Rutter and Brands Hatch Morgans hold good stocks of parts and are very helpful. You can fit SSL suspension on the front with chrome king pins as well to improve the handling and reduce long term wear. And maybe a Panhard rod. So there are plenty of small projects to be done if you want to tinker. And a decent example should be relatively inexpensive (15-20k ??).
Downsides are the single circuit braking system - which in theory is less safe than dual circuit. And they are unassisted, so may need a firmer pedal pressure than modern cars. The steering is also unassisted, but its a light car on relatively narrow tyres so not a big problem when parking. The headlamps and lighting in general are not as good as modern cars - but thats just a 1970s thing. It might be hard to get a replacement steering box if you need one.
Tools needed: spanners, socket set, screwdrivers, feeler guage, timing light/gun, multimeter, soldering iron, wiring crimp tool, good set of axle stands, quality jack, nut spinner (for the wheels), inspection lamp would probably be enough to do most things.
I suspect though you knew all of that though !!
I would suggest your friend have a look at the following so that they can see what they are getting into:
Some useful books: (R. M. Clarke Morgan Four Owners Workshop Manual and Buying Portfolio (Paperback))
Trad morgan parts list:
https://mogparts.net/userfiles/ckfiles/files/Early-cars.pdfIt would be worth them getting a copy of Allon Whites Buying Guide too:
https://allonwhite.co.uk/classic-morgan-car-buyers-guide
