It would depend upon why your vet thought the spay might be too risky in the first place. The health panel is a good idea--it checks for organ function and general health. Ask your current vet lots of questions and go from there.
If she's in good health, doing the spay at the same time as the hernia repair is a good idea.
"We are--each of us--dying; it's how we live in the meantime that makes the difference."
"It's not what you gather, but what you scatter that tells what kind of life you have lived!"
"Be kinder than necessary, for everyone you meet is fighting some kind of battle."