Three U.S. cities are considering a plan to use massive aerial drones to respond to police and emergency calls that will report back to authorities with video and other specifics on the scene before first responders arrive.

The machines, bigger than a king size bed and fly up to 100 miles per hour, would potentially be tied into the city’s 911 system and hangered in specific locations to respond to calls within 90 seconds, the Greensboro News & Record reports.

The proposal would spawn from cooperation between two companies – Olaeris and HAECO Americas – that plan to manufacture the drones from a facility in High Point, North Carolina. Company officials pitched their plan recently to Greensboro city officials, who seemed interested until they heard the price tag at a work session Tuesday, according to Fox 8.

Company officials said they’d make the drones, secure FAA approval, build hanger pods, provide software and train pilots for free, but if the city likes the service it’ll run $96,000 a month for a five year contract for a total of $5.7 million. They want to get the program up and running by 2017.

“That number stopped me,” Greensboro councilwoman Sharon Hightower said. “That gives me a lot of questions.”

Olaeris and HAECO officials told the city the drones would save taxpayers cash, but couldn’t provide specifics about how much, or exactly how. The drones, they said, do not require fuel and can travel for 100 miles before a recharge. They could conceivably cut a typical response time for fires of 11 minutes or so to about 90 seconds, though the drones can’t actually take action.

But the images the drones send back to first responders rushing to the scene would give them a better idea of what’s occurring, and the best way to proceed.

HAECO Americas’ new facility to manufacture the drones is located near Greensboro and would produce jobs and economic benefits, company officials said, though they could not provide specifics on that, either.

“I was excited by their interest in our area, but I’m looking for more details,” councilman Justin Outling told the News & Record. “If it saves us $200,000 a year in other costs, then it becomes a lot more attractive. But we just don’t have all the information yet. It would be premature to make a judgement on the project right now.”

“It was an interesting presentation and the partnering companies and really strong, but the business plan wasn’t there,” Mayor Nancy Vaughan. “It’s a significant investment they want us to make and I think we’re lacking some of the information we want before we’d do that.”

That’s the same conclusion officials in Georga’s Macon-Bibb County came to after they heard from Olaeris. The county officials and mayor seemed poised to move ahead on the proposal, but public backlash convinced commissioners to table the issue until there’s more information available, 13 WMAZ reports.

Many commenters to 13 WMAZ reports on the deal highlight the obvious privacy concerns the drones pose.

Commissioner Mallory Jones said “my constituents have overwhelmingly 100 percent that I’ve heard from have said ‘no.’

“We haven’t seen the actual product,” Jones said. “We’ve seen computer-generated video that shows us what it can do.”

Both Greensboro and Macon-Bibb leaders plan to research the drone proposal further before coming to a final determination. A third Midwest city is reportedly also considering Olaeris’ proposal – the company is looking to create three hubs close to manufacturing sites – but remains unanimous.

In all cases, contracts with Olaeris are precipitated on the delivery of fully operable and licensed drones.

“There is no risk to us whatsoever, until they get all the licenses, until they demonstrate to our satisfaction that it works. We’re not on the hook for a dime,” Macon-Bibb mayor Robert Reichert told 13 WMAZ.