I'm about to this conclusion. I got the longarm for donation work. I planned to be standing at the quilter when I was 80 working on quilts for charity. I couldn't justify buying one for the few quilts I make. But it hasn't turned out the way I had hoped. Not much can be done about that. Maybe I should just sell it.

I agree about the final recipient. I'm not seeing any concern about that. I'm pretty sure all the donation quilts aren't being washed before being awarded. Some of the vets are already sick. They don't need to add to it.

As far as selling your long-arm -

If it is already paid for and you enjoy using it - make more quilts and get more use out of it! :-)

Or use it for a coatrack - place to put stuff until you get around to putting it where it should go. :-)

I see no reason to feel guilty about using something just for one's own purposes -

This will probably sound extreme but have you considered allergy shots. I know people who have major allergies to animals and they get shots for it. It would allow you to continue your work with less hassle but it is a monthly injection. Many people have pets probably more so than dont so it might be hard to truly get tops of pet owners that won't affect you. Removing hair is easier than removing dander as dander is in the air and you can't see it

Wow, you must be in exceptional physical shape and/or have robotics.

I can't imagine being physically able to longarm quilts in my 80's. At least not the volume that most charities would create.

Longarming takes a physical toll.

Nope. No robotics. The longarmer for one of the groups here is 79 and still going strong for at least a couple hours a day.
I panto.

I'm 70. I don't longarm, but I still stack hay and carry 50# sacks of feed. Being old doesn't have to make you feeble.

Good idea! Those masks filter out paint fumes so they would definitely filter out pet dander.

Paper masks keep particulates out but not fumes. I wouldn't wear one in my own home to do volunteer work.

Me either.

I don't gift quilts that didn't have a run through the washer first. With the formaldehyde and who-knows-what chemicals are in fabric these days, it is my decision to work with unwashed fabric because that only affects me, but I would not give that away in unwashed condition. Same goes for pet hair.