DIFFICULT TO GROOM DOG

iI adopted a senior 12 Y/O female Yorkiepoo (Misty) from shelter in June 2022.  Immediately made an appointment since her nails were so long and her hair needed trimmed. She has been grooming my dogs for years, no problem.  Well, now way she could do anything but, clip one nail after spending a few hours with her.  Next made an appointment with another local groomer with meds from vet, but still could not do her. Tried another groomer, that grooms difficult dogs, again no grooming.  Only thing to try next was the vet prescribed another med (Gabapentin) & was going to put her out for shave & trim nails (COST $200).  Cannot keep doing this – too expensive.  She is in need of another nail trim & bath (Tried, NO COOPERATION), hair trim.  I've tried to trim around her face, but she only allows me a few scissor clips.  She turned 13 in December, but still acts like a pup.  She gets along with my other dogs and I love her very much. 
I am 79 y/o with thin skin and her nails scratch me up, plus she keeps scratching up my silver appliances. 
Is there any advice or help you could offer to me?  Thanks, Judi.

Dr. Betsy's advice:

Dear  Judi,
My suggestion would be to ask your vet if you can get the gabapentin to give her at home.  We use it on cats that won't let us touch them at the shelter, and it often makes them very easy to work with.  Maybe have your vet give you a dose to try at home to see how it affects her, and if it seems to make her nice and mellow you can get another dose to give her before you take her to the groomer.
I hope this helps.
Dr. Betsy