Subject: Print personalisation with variable data Inkjet printing on paper, envelopes, boards and books

I would like to do this as a profession and want to know the investment , manufacturer's or service providers in India or nearby countries for variable data printing like addressing labels, mail merge in bulk, numbering and barcoding with details on future for this business. They say digital is expensive and inkjet is cheaper. Is there any website which can give us a comparision between digital and inkjet printing. Please advise and tell me how to start this business and who can be approached for this with the kind of investment. On local enquiry, they say Lions club, Rotary club, associations, saree bandhars, airforce associations, community sangh do lot of mailing jobs month after month. Is there any project available on this with details on return of investment. I am only a graduate with little computer knowledge. Your help will be great help.