Would just like to say thank you to all who have replied. It was really helped me a lot and given me things to think about.
I paid around £600 for my current PC back in 2015. Becoming very slow, and boot up is like treacle. £60 a year for a computer is quite reasonable.
I have the iphone SE (3rd Gen), first time having an Apple product, and found it so much more user friendly than Andriod. Now I need a new PC, a Mac is the obvious choice for me, but I am reluctant to spend a min of £1300 on an iMac.
It's only an extra £100 for the 500Gb (£800) mini so not a massive bank breaker. Not currently bothered about a magic keyboard, so my current wireless keyboard and mouse will do.
With regards to My Cloud Home, I have mapped this on my current PC and Windows laptop. When at work, I can just connect to the mapped drive on my laptop and access all necessary files. I was hoping that the same could be done with a mac. Obviously, there may be some changes needed, but was hoping the principle would be the same.