In Jagannatha Puri Chaitanya Mahaprabhu’s only occupation was holding Sankirtana at least four hours every day and distributing prasadam to the devotees.
As far as Sankirtana is concerned, that should be continued in all circumstances. Chanting of Hare Krishna, Sankirtana is our life and soul. Side by side, if possible, then you can attempt for the ISKCON restaurant and Krishna Prasadam distribution, but this I think is secondary.
Letter to Nathan baruch 1968.