Amber has never prioritized her health or the health of her pets. She doesn't get Twinkie's nails trimmed so the poor morbidly obese dog's paws probably constantly ache, she wouldn't get her cats fixed for a long time either. As for her... just LOOK at her, she doesn't exactly embody health.
She's also never once demonstrated restraint, most recent example promising to only eat out for Becky's birthday and immediately breaking said promise but there's also her claiming to eat whole family sized bags of potato chips and pints of Ben and Jerry's every night. If she demonstrates this little control over her eating habits why on earth should we believe she can save money? If she was saving enough for medical emergencies that could occur at her size and the days of inpatient care that could be required afterwards, it would be cheaper to get insurance, especially medicaid which... with such a spear-y-od-ic income she ought to be qualified for it.
I never believed her $10k a month lie and I don't believe she saves anything.
If it's so important to her that the haydurs know she's capable of not spending all her money immediately on plastic garbage and food she could actually show her secret savings money stash or she could adult the fuck up and get insurance and make a doctor's appointment.