Thinking of moving to Brighton from London

Sorry this is going to be a long read! Both my husband and I have lived in London since childhood. We are in our early 30s, have a 2 yr old daughter and currently private renting a 1-bedroom flat in south east London. We got lucky with where we are currently as the rent is cheap-ish for the area, has good travel connections, and it’s a safe neighbourhood. I’m currently at a stay at home mum after recently finishing an apprenticeship in horticulture. I decided to take a break from working due to experiencing severe burn-out from being the primary parent, studying and working full time and other stressful personal life stuff. I’m exactly not sure what I want to do next so I feel as though I am more flexible than my husband. He has recently left his 9-5 job to do freelance photography/videography full-time, and wants to pick up a part time job that allows a flexible working arrangement. I have family in Ramsgate and Brighton, so I’m considering these two areas to move to. I feel quite overwhelmed with making sure it’s suitable for us as a young family, good job options for my husband and I, good schools, etc. My partner hasn’t been keen on the idea of leaving London, I’m very much an introverted person and hate the busyness of London. But he finds much comfort in being here and all if not most of his friends, family and hobbies are based here. He is also autistic so doesn’t handle sudden change very well and he doesn’t think he’d be able to adapt to a whole new town. He wants our family to be better off financially and wants the best for me and our daughter but I just can’t see how that would work in London, especially with the rent prices as they are. We can’t afford to rent a 2 bedroom flat here! I think we should move sooner rather than later, especially before our daughter gets to school age. We have been co-sleeping since her birth and I know it’s important that she starts to gain more independence soon, like having her own bed and bedroom. Currently not practically possible for her to have her own floor bed here as our room is too small unfortunately. I don’t want to stay in our current home just because it’s comfortable and somewhat affordable, when we could possibly provide a much better life for our daughter and ourselves elsewhere. Any advice is much appreciated. Thank you!