Seem to remember hearing his Dad was working 2 or 3 jobs to get enough money to get him going. With his brother’s disability as well I’d guess they’d have been pretty tough times for the family.
Billy Monger’s parents don’t look like they were born with silver spoons in their gobs either.
Hamilton went to a state school. Same one as Ashley Young... and Billy Monger's parents don't come across as Lord and Lady Monger of Charlwood. I'd guess they were both from hard working families, which the government love, and put a lot of time and money into their sons' passions, although I'd also guess that sponsors and teams would have taken over financially once their talent emerged.