Congratulations on the funding, and don't worry about accepting funding that could go to someone who might have a different kind of career - the funding body has made the decision they are happy to fund you, and plenty of people start out aiming for an academic/research career and do not have one, for lots of different reasons.
I am working full time, have two young children, and have just started the fifth and final year of active research on my PhD. I have a further two years writing up if I need it, but really don't want to be doing this for another two years if I can help it. I love the research, reading and writing (not so much other aspects of being a PT PhD student), but the compromises are very great.
I feel that I have four major tasks - my job, family, PhD, and my own health and wellbeing. Out of these, I can do maybe 2.5 of them at a time. My physical health and wellbeing tends to be deprioritised (on the other hand there are mental health benefits to doing something intellectually stimulating). Out of job, family and PhD, I am never able to put in what I would like to on all three, all at the same time. Over time, I hope it works out acceptably for all of them.
I would not be able to home educate at the same time - no way - but if you are doing this instead of a paid job, and if you are an experienced home educator, I wonder whether it might work out? Full time PhD students in the social sciences are usually doing other things besides their research, to earn money and gain experience in things like teaching and academic administration that are important if they are heading for an academic career (which it doesn't sound like you are?). But you need to keep it up for a long time, and you will need the active support of your family in ring-fencing sustained time and space for the PhD.
The nature of your research might also be relevant. Do you need to collect data at strange times (e.g. night shifts in a hospital/factory), over a long period or where access might be difficult and cause unexpected delays? If your data is easily available this will de-risk the project and give you time and flexibility.
Good luck!