There isn't any one answer to this questions because there are a wide range of Buddhist communities, each one might have a slightly different model of economic sustainability. Some are self-sustaining, some supported by the community others might receive some form of grant or charitable funding. You need to provide a more specific example.
To provide military support for missions, and later settlements, until these communities could support themselves! ;-)
Transition Networks provide support within communities. They aspire to inspire and encourage and help to train communities to help themselves for the better.
For some, it's for fun. But for most, it's in order to support themselves, their families, their charities and their communities.
For the same reason that lay Christians support monasteries. Not everyone is suited to a life of devotion, but most people recognize that spiritual seekers give back to their communities in myriad ways which should be supported.
Medical communities, support groups, therapy / therapists communities, and local / related family and friends.
homeland defense and civil support operations
Emergency Operations Center
Planes are essential to military operations. They transport troops, cargo, supplies, etc. all across the globe and provide support for combat operations both on the ground and the in the air in offensive and defensive operations.
Communities provide support and a sense of belonging to their members through shared values and goals.
i think it means that transfer of matter and biological communities support the living thins i think
i think it means that transfer of matter and biological communities support the living thins i think
they support bymoving \