Kate said the support has been overwhelming.
"It's really hard to know what to say with the amount of support we are receiving because you feel thank you isn't enough. It is humbling.
"It's a reflection of his character - he is a very charismatic, magnetic person - pretty amazing."
Just two hours away, students at Te Aute College were too raising money by running laps for their school's former head prefect, house captain and member of the first XV.
Te Aute College teacher Liz Graham said it was about making their young men aware.
"By becoming a boarder at our school, they become a part of a brotherhood that carries on after school. That's what's happened with Neilroy - the rallying around of his mates, not just from the College, but his army college who have travelled home."
Sergeant Daniel Martin organised the event and said it was just as much for McGregor as it was for everyone else.
"It's for the community to get together and show their appreciation. It is testament to his character how many people want to get behind him and show their support.
"I was actually deployed overseas with him when he was diagnosed and when I came back we talked about doing something that was amazing and it really just came together with the help of all the units in camp.
"We got approval from all the people that we needed to get approval from and just ran with it. We put it all together in a couple of weeks."
He said a couple of teams deployed overseas doing their best to get some laps in where work outputs allow it.
A Givealittle page has been set up to raise money to help the McGregors get in a few more memorable holidays, as well as pay for unfunded treatments.
Kate said Neilroy has always been an advocate for trying to tick things off and so the money would go towards making memories.
One of the things on their bucket list is to swim with great white sharks, which they hope to do on the South Island next year.
To give to Neilroy and his family visit: https://givealittle.co.nz/cause/neilroy-mcgregor-and-whanau/donations