Listen to your husband.
They aren't that fragile.
You do have some concerns that you should have though.
The pup should "not" be let on the floor at the vet's office until at least 2 weeks after completing puppy shots and even then, some people don't. No groomer until 2 weeks after either. There are good groomers out there but there are enough not-so-good ones for me to want to avoid it entirely. Learning to groom yourself can save a lot of money and limit stress.
If you find a good vet, they'll get used to the calls.
She may goes through one heat if you are spaying at 9-10 months.
Just get a diaper for her unless you want your furniture stained.
there are charts online about heat stages and durations.
If she comes into heat right before her spay, I'd postpone it.
I would never allow a long surgery to be done with anything but gas (Isoflurane or Sevoflurane) to maintain. Short procedures (a few minutes max) may be able to be done with something like Propofol but in general...gas or new vet.
After 7.5 years, if Ellie is sleeping with her nose in a blanket, I still move her head.
She does snore sometimes and it is soooo cute.
When Ellie first came home, I knew nothing but it all worked out.