What is your shift pattern like? How old is/are your DC?
Mine were in nursery 7:30-630 from about 6m old. Not easy trying to work around that and shifts (my ward day shifts are 7-8, early shifts are 7-3 and lates are 1:30-8). At primary, I put them in wraparound care. XH wasn't much help at all (even when we were still together - so that had its own set of problems). In holiday, they went to holiday clubs. None of the paid childcare I used coincided with my shifts as there simply wasn't anywhere (either nursery or CM, apart from one CM, but that cost me over £400 each weekend) that opened early/finished late enough, so that was a nightmare. My DF and DM died years back so didn't really have anyone. I think I just muddled along, did childcare swaps with friends and so on.
When XH left (no help from him), I managed to negotiate my FT working hours in to 4 set days each week, initially as a trial basis: when the ward saw that it worked well, Matron allowed it to continue. I was able to start work late/finish a bit earlier to do drop offs and pick ups for wraparound care (7:30 start and 6:30 pick up) and it's been a godsend. I'm also able to keep working in a job that I love. My bosses know that I'm reliable, work hard and that I don't plan to go anywhere....and that when my DC doesn't need childcare, I'll go back to normal shift pattern (I won't go back on to nights until youngest is a lot older).
Another thing is that a lot of people who don't have kids (I'm referring to some of my former managers/colleagues), don't realise how bloody difficult it can be to find bombproof childcare, particularly if you are a single parent. One of my aforementioned managers gave me hell for years, then got pregnant and asked me about the childcare I used: she was horrified when I explained to her exactly what I was paying, the hours the childcare was from/to etc, and did a 180 turn in how she treated me (she actually fought my corner when I had to negotiate my hours).
It IS a hard slog, but I've learned that searching thoroughly for what is available and then putting forward good plans re: juggling work and childcare can help. I also think that sometimes employers have to think outside the box a bit: there are plenty of people in my situation but a slight bit of revision to working hours can make such a difference. My DB and DSIL have condensed their FT hours into 4 days. They each have a different day off in the week, so only pay 3 days a week for childcare.
Like PP have mentioned though, this won't last forever. Kids grow up. My youngest is in Yr 6 now. She takes the bus home from school (short trip) with a classmate who lives in the same village. This term, I am starting to get her to take the bus to school, so that she is prepared for secondary school. We have a key safe at the back of the house and she lets herself in until my eldest gets back from school (he's 17).
When you're looking at schools, bear in mind that not all have onsite wraparound care. Often there is wraparound care offsite, that will do school drop off and pick up. Look at CM, nurseries, holiday club provision in the area and (if you can stretch to it) nannies (I couldn't afford this but have heard that sometimes people do a nanny share thing) or even maybe au pairs (again something I couldn't facilitate). Look also at opening/closing times and logistics for travel/commuting. Start this research sooner rather than later so you can get on waiting lists and give yourself time to try and sort things with work.
I'm betting that your XP will have his shifts given to him in advance. I know that none of us can force our XPs/XHs to share the childcare but is there a chance that he can have your DC on his days off? To cut down on the childcare costs? Or is that a pipe dream? Wishing you all the best x