It’s a very personal choice. I would suggest visiting lots of different settings, childminders and nurseries and see what works for you. I speak as an ex nursery manager and current CM.
Yes nurseries can cover holidays/sickness easier than some CM, but they also have a high turn over of staff...and some use unknown agency workers to cover sickness/holiday.
Some CMs, like myself, belong to a network, so if I’m off unwell (only happened 3times in 7yrs!) or on holiday, there are plenty of other local CMs that the children know. It’s also worth remembering because of the massive inconvenience it is to parents, good CMs are less willing to have days off. As they also work from home, so if they are feeing ill, it’s relatively easy to arrange a movie day and just soldier on through...
I have also found, that the quality of care, especially for under 3s is substantially better in CM settings, because it’s smaller, less alien, feels more like what they are used to, as opposed to loud over stimulating nursery room. (Just my opinion!!)