- What we now have to show is that it can do this in a cost-effective manner and in a way that it can be useful across the country. So far, these units are largely confined to just a few regions around the country. Most are in metropolitan regions, some are in more rural areas, but there's a limited number of them. There are only 20 of them around the country, and obviously we have to have many more if they're going to have a big impact on care. And we have to find a way to pay for them because they are not cheap to run and to operate.