I really really feel for you OP, we were in the same position 3 yrs ago, we had rented for 9 years. It felt like we were never going to get on the property ladder, with no help from family and average wage, sometimes only one coming in the outlook was dismal.
OH is a real saver though. His mantra is 'I don't care how much something costs. It's all about if you NEED it. If somethimg costs 1p & you don't need it, don't buy it, if it costs £1000 you need it, buy it. He works in a chippy & works about 43hrs a week, earns under 26k a year, he's the hardest working person I know. I work part time, I don't earn much. He's a saver, I'm not too great, but over the course of about 18 months, we saved around £11k - we tightened our belts, started shopping at Aldi & basically never went out (didn't really anyway!). As long as we had food on the table, the kids had what they needed, the bills were paid, that was it.
Of course, it all depends greatly where you live, we live in a quieter place, where house prices can be high, but we fell lucky & saw potential in an old council property. It needed a lot of work & took advantage of the HTB scheme so we only needed a 5% deposit. Being only 2 bedrooms, we had to sleep on the floor for a year while the kids had the bedrooms - there was no way they could have shared a bedroom, it would have been WWlll! We had a little bit of money to get immediate work done to make it habitable but had to save for another year to get another bedroom done for us!
Is there anywhere else you can rent cheaper than where you are now? If so, that would be a start, even if it's £25 a week less, its £25 in your pocket a week. £100 a month. Look at ways you can possibly save anything at all, I know it's hard & can seem hopeless, especially if you've got credit cards/loans as well. It's not impossible though. Good luck OP.