Just had one done Sep 12th; being 71 & retired, I have Medicare and a Plan G from Mutual of Omaha.
I've hardly paid a dime, except the initial visit to the Surgeon's office.
MUCH better than feeling like I'm being stabbed time after time; right now I'm doing well, with the range of motion improving.
First week was kinda hellish from the restrictions, discomfort, leg swelling - but my deal was more invasive (semi-posterior) than the usual anterior surgery.
I quit the pain meds after a couple weeks; they create intestinal blockage, so ya need a diuretic.
Couple weeks using a walker, then a cane for a bit, and gotta watch pelvis/femur angle so it doesn't exceed 90 degrees (toilet seat riser, watch bed/sofa/chair heights).
She'll likely have to be cleared by her Dentist before surgery - oral bacteria apparently attacks the hip implants.
There was a wait for mine, about 2 months.
Post-surgery, the usual deal is in-home PT for a month, then outpatient PT for 1-3 months depending on muscle atrophy, balance, and mobility.