It is doable with children, I am managing it with three. My DH is also home a lot and my youngest is now full time in school, but it is tough. My sil did her training as a single parent with five children and help from family.
Things to consider:
The placements may be much further than the university and getting home after a long day/night might make it even longer.
Most shifts are 12 hours, you will likely do 3-4 a week and may not see your children on those days.
If you do nights and your children are at home it can be hard to sleep in the day.
It is like working a full time job and studying.
The essays and placement work have to be done around placement hours.
It will all affect the time you have with your children and your husbands working hours if he is shifting that to watch them while you are gone. That could impact the income he is able to bring.
It will be easier to manage when they are 3 and get free hours in nursery, if you can last until then by juggling things.
It is physically and emotionally draining at times, but very rewarding. I do not regret my choice.
If you put your mind to it you will do it, I have coped better than many of the younger students in some ways because I am used to being organised and spinning many plates.
Just go into it with your eyes open and you will be fine x