If the " whisper number" is over $200, 000 for class B, I couldnt imagine the earning potential for a TT, but im sure its alot more then telemarketing.
Idk about your starting capital, but if your going to invest in a Sprinter, I would wait a few months for the Ram Promaster or the Ford Transit. These vehicles will leave recent Sprinter buyers with severe cases of buyers remorse..im suspecting a few suicides..especially North of the border.