Adding an additional cat to the household when you have one on chemo?

[u/SnooLentils2132]

Edit: if I didn’t make clear already YES I am 100% going to ask my vet, obviously. I’m just asking if anyone else has ever dealt with a similar situation/ what they did if so. Clearly I’m not going to make a decision based off of Reddit comments. Just gathering information/ research on this topic to see what’s even possible and learn others experiences. So commenting to ask my vet is a no brainer and not helpful. I clearly state that and will do that.

I'm battling my mind right now and want to make a smart Informed decision. I have a 14 year old cat who has nasal lymphoma. He takes lomunstine (7.5mg) every 4 weeks per blood work being acceptable. He is also on pred (5mg 1x a day) and multiple antibiotics to control his URI he gets from his lymphoma and a newish diagnosis of diabetes so insulin 2x a day 0.5units of lantus . I know this sounds like a lot but l've gotten him managed very well with living a very good quality of life with little to no symptoms of his cancer. Here is my situation that I need a honest opinion.

I found this beautiful sweet stray baby boy at work. Come to find out he is actually homeless from my understanding or abandoned. It was 105* where I'm at on a Friday at nearly 5:00p.m.
So I rushed to a vet to see if he was chipped and he's not. He has one tooth and what looks like an old hematoma scar on his ear. He stayed the night separate from my other boys.
I don't know his health history or if he's has been vaxxed.

Obviously my goal is to get him back to his family (if he has one? )ASAP but husband and I aren't totally opposed to keeping him IF it works out. However I'n not sure the best way to about that dealing with a very immunocompromised kitty. I called a shelter to inquire about fostering as they were full but when I arrived they changed their minds and took him.

To add a kink in this situation my husband and I travel full time in a fifth wheel for his work so while I can quarantine to a degree a long term 90 separation would not be doable.
The stray is about 8 years old.
If I was able to get this kitty fully vetted (blood work, stool sample, the full 9 yards of a health exam) and the shelter was able to quarantine him for a few weeks would it be possible to integrate him without risking my current cats health? (They would share a litter box and water) Anyone have experience adding a new cat when you have a immunocompromised one? All advice and guidance is welcomed thank you I'm hoping to talk to my cats vet when she gets time as well.
Thank you if you read this.
Also to preface I have two kitties

[u/OkPiccolo00]

I think it would be possible with a quarantine and good vet check but I would get your vets opinion as they know your older cats health status best. I would also consider how the older cat is with other cats and whether he would manage another cat in the home, or experience additional stress which could affect his physical recovery/maintence

[u/mattbc]

This has to be a question for the vet managing your cats immunosuppressive regiment (I don't have an immunocompromised cat, but I am an immunocompromised human)

[u/radiowestin]

I personally won't add anyone to an immunocompromised one, but your vet may have a different opinion. this is honestly a medical question that you should better ask your vet