Just moved I packed and decluttered for 4 months, once viewings were over. I sold lots too but still had so many items as I'm buying a wreck so I have bought diy items needed too.
I went to shops early mornings and asked for their packaging, I got lots of bubble wrap and boxes and I asked people I knew that were also moving even from 6-12 months before and so I was given lots of boxes.
I did it myself with my teen dd who is physically strong, except for the sofas, a chest of drawers, bed box, wardrobes and white goods which wouldn't fit in my car so I paid £110 for 3 hours of a man and van to help me move them, they went into 3 different garages. And my friend has some items as i ran out of space.
So a 3 bed 3 reception room house plus den plus shed is now spread across 3 garages, my friends and my mum's with the everyday things as we are staying there.
I did nothing for a week after I'd moved the last item, as it took me at least 100 car loads, the last month I did 5 or 6 a day.
It was relentless but I saved over 1k and I needed to save it as I'm moving in two parts and will probably have to pay removers for the second part as moving 100 miles away.
My top tips are get really decluttered, sell things that are worth money, pack well, ie winter clothes wrapping delicates, get loads of packaging from shops like Bm and the range who have lots of small wrapped items in stock, homebase does a free box section, the local tip also gets boxes so you can ask there too. Aldi bags are cheap and strong, Amazon do 100m bubble wrap for, £6 or 7 included post.