Tourism is a job creator many times over. Every tourist needs a place to stay in, food to eat, and transport to move around. Some of these (the first two) may require some capital investment, but the transport could come in various forms, including private taxis or aggregators, or other local options (two-wheelers, cycle rickshaws, etc.).
Guides speaking multiple languages are an asset, and so are other information creators and providers. Local travel agents can also play a big role. Entertainment providers can also think creatively and develop options for travellers on a tight schedule, or those with more time.
I have recently started looking into tourism for research, and I find it's an area rich in potential for research too. If the right policies are followed, India can probably outdo itself with its rich variety of travel motivators, from history and architecture, to spiritual or medical reasons.
Good marketing of course, can lead to a big impact on tourism, both international and domestic.