Hatzola has raised more than £100,000 towards the creation of a new branch of the volunteer ambulance service in Hertfordshire.
The early total is half the fundraising target for start-up costs and equipment.
The hope is that Hatzola Herts will be operational by Rosh Hashanah with 15 trained responders serving Elstree and Borehamwood, Radlett and Bushey.
Fundraising campaign manager Ian Grosskopf said: "We are looking at an approximate cost of £100,000 just for equipment. We then have infrastructure, such as radio communications and telephone systems for the dispatch centres we are setting-up. We don’t receive backing from the NHS."
Halachic guidance is being provided by Dayan Menachem Gelley of the London Beth Din.
Mr Grosskopf said the pandemic had added “a sense of urgency” to the project.