It sounds to me like Tabby would be much happier at home.
May I ask how your vet is force feeding her? If the vet is using a tube, she'll have to stay. If the vet is force feeding her by hand (syringing a fine wet food) I would like to ask if this is something you could do to/for your cat?
If you can't, poor Tabby will have to stay at the vet's. If you CAN...you could argue that you could bring her home and do the feedings yourself. However, something to consider is how debilitated she became from her near deadly virus infection and if she has the body condition to return home...
My Malibu went through Hepatic Lipidosis (cat jaundice) just before Turkey-Day last year. We had just spent $250 on parts for my car and another $250 w/ Mal at the vet for the visit and testing to learn she had HL. Vet said the cheapest she could get treatment down to was $400. Well, after spending $500 and still needing to make the mortgage payment...I was faced with euthanasia or treating Mal at home.
My vet said most cats with HL that were treated at home died. They died because the owners could not get enough food into them. This is usually because the owner cannot force themselves to make the cat eat. The only way to save the HL cat is to make it eat, or it dies. Period.
I stay at home and was able to feed Mal every couple hours, only stopping for the 6hrs/night I slept. She pulled through and has done wonderfully! We are even closer now, which is surprising to me, because she was an aloof previous feral before her illness. Now she is a snuggle-muffin with me and getting friendlier with hubby, too.
If you CAN force feed your cat, I'd say to bring her home and do it. If you work, you can schedule her feedings for right when you get up, another just before you leave, immediately upon returning home and perhaps 2-3 more between then and bedtime. I think minimum is to get 60ccs into them daily. I was able to feed Mal 14-20ccs/feeding, and I think that amount would work well for Tabby, too. I would recommend (prescription thru vet only) Eukanuba Maximum Calorie over the Hill's a/d because the Euk has more protein than the Hills.
I purchased many different brands of dry food to tempt Mal. It was a wonderful moment when I heard her crunching dry food on her own in the middle of the night. I knew we had turned the corner. The dry food that tempted her was Fancy Feast Gourmet Gold in both flavors.
Good luck with Tabby, I'm sure she'd be happier at home and I hope you get to bring her home soon.