I don't understand why people think 'being poor' as a young kid, and then quite well off and going on holidays and to dance classes as a teenager, is such a hardship.
Plus - unless mum came into a huge inheritance out of the blue, it wasn't like OP was dirt poor til age 10, then comfortable and going on holidays from secondary age. In reality, mum was accumulating wealth from when OP was relatively young so she could afford to pay a deposit, buy a house, pay for holidays and dance classes as OP got older etc... etc.. As she was accumulating this wealth slowly over time, I doubt she'd have prioritised saving her house deposit over giving the kid a meal, so bar the odd pot noodle OP doesn't seem to have suffered an empty belly at all.
Poverty is associated with poor outcomes because of its increased association with other things like poor parental mental health, substance use, poor parental education, lack of reading and writing ability in parents, lack of education opportunities and books etc.. for kids, mould and disease in homes, abuse, neglect, exposure to gangs and grooming etc..., lack of access to prosocial peers and safe adults, over exposure to opportunity for exploitation etc..
People can be poor and not have any of those associated factors! In fact they can be poor and loved, have a good education, have great role models and good access to books, stimulation and other resources, can have access to great parenting role models, have access to good teachers, have good prosocial peers etc . In which case, the poverty is not that bad. I know OP had a pot noodle here and there and saw her mum crying on occasion. But I don't get what's so bad about that if most of the other factors which can be associated with poor life outcomes weren't present.
If OP said 'i grew up in a council flat, mum was addicted to heroin and her partner beat me up, I was rarely taken to school because mum couldn't get out of bed to get me there. I was behind at school cos we had no access to books at home and mum didn't value education, I was always in trouble at school because I copied the way mums boyfriend treated her and lashed out. In secondary school I never had a money for extra curricular activities. We never went on holiday and school holidays were awful because that's when mum would loose it with me, hit me, send me out to buy her drugs..' If she said all that, and had overcome all that to attain a country pad and horses, I'd think 'bloody hell, you did well!! You should give yourself a pat on the back!'
But in reality, OP seems to have had a really nice life, lots of privilege, a mum that loved her and cared for her and bettered herself for the sake of her daughter.
The only difficulty was having a bit less money as an under 10!
Sorry but I don't get what's so hard about that or why OP needs to tell this as a rags to riches story.
Why can't her story be 'i had a great mum, loads of good role modelling, access to education and opportunities others could only wish for as a teen. As a result, I've got myself into a STEM career which I enjoy and work hard at and has enabled me to get the house I want and the horses I love'.