Would you learn in the 22 or 44? Mark at LHC seemed to think that the 44 would suit me better (partly because I am overweight, partly because they are just nicer.)
They are just nicer. Quieter, faster, more rotor inertia, more spare power (if you don't highly load it), auto's like a dream, fuel injection if you train in the Raven II. If you have the dosh, go with the 44.
However, if you are heavy then with an instructor and limited fuel in a 22, it will teach you to fly on the edge of the envelope!
As to the why do it at all - for god's sake, man, it's a life experience. Have the fun of doing the training and see where it goes from there! Life doesn't always have to have a financially viable purpose, and a £400 bacon sandwich can be a lot of fun. Stop thinking about it so much!
Lafite.