A fundamental problem is not the training, it's the tiny list of Permit aircraft capable of being legally flown IFR.
Frankly, for that specific purpose, I'd buy a share in something with a CofA and decent instruments.
And possibly *also* buy a Permit aircraft, or a share in a Permit aircraft. [He says having for years had shares for years in both an IFR tourer - on which I did my IR(R), and one of several successive VFR only nice, cheap, fun aeroplanes.)