The Thai Navy SEAL wrote on Facebook on Tuesday it's expecting day three's rescue operations to be longer than previous days.
It's been dubbed, "the last meal for SEALs" as Tuesday is expected to be the final day of rescue.
4.27pm: The third day of the rescue mission has reportedly begun at 11am today (local time).
Four other youngsters and their soccer coach are still inside. Thai Prime Minister Gen. Prayut Chan-ocha visited the hospital Monday, and spoke to relatives and hospital workers.
The plight of the boys and their coach has drawn worldwide attention since they became trapped when they went into the cave after soccer practice on June 23.
The complex rescue mission to extract the football team has been ongoing for several days, with an worldwide team of rescue divers leading each boy individually out of the cave complex, fitted with a full-face scuba mask and carrying a supply of oxygen so they can pass through kilometers of tapering tunnels flooded with monsoon rains.
Thai soldiers stand guard outside the Tham Luang cave area as rescue operations continue for those still trapped inside the cave in Khun Nam Nang Non Forest Park in the Mae Sai district.
The eight boys brought out on Sunday and Monday were in good health overall and some asked for chocolate bread for breakfast, officials said, though they can't yet digest the spicy dishes favoured by many Thais.
Chiang Rai Gov. Narongsak Osatanakorn said he was thankful for Musk's support but the equipment was impractical for the rescue mission.
Rescuers have freed all of the Wild Boars football team from a cave in northern Thailand more than two weeks after the 12 boys and their coach were cut off by floodwaters.
However, the divers escorted eight of the boys out on Sunday and Monday, and authorities said they were aiming to extract the remaining members of the group on Tuesday.
This means that a total of eleven boys are now out of the caves, and on their way for hospital observation via helicopter.
A doctor and three SEALS who had stayed with the footballers would also come out on Tuesday, he added.
Two boys and their 25-year-old coach remain in the cave.
Two of the first boys had mild lung infections which could be pneumonia but, he said, most of the boys were "fine, normal" and had undergone a battery of tests, X-rays, and received vaccinations.
They are all likely to stay in hospital for seven days due to their weakened immune systems. "We are just praying for them to have a safe return".
With oxygen levels in their chamber falling to risky levels and complete flooding of the cave system possible, rescuers pushed ahead with the least-worst option of having divers escort them out through the extremely narrow and water-filled tunnels. The first rescue on Tuesday took about five-and-a-half hours.
"They are getting forced to do something that no kid has ever done before", Ivan Karadzic, a diver involved with the rescue mission told BBC. Mini-sub is ready if needed.