That is still undecided between us. There is talk of completely stopping and also of offering reduced service as a surprising number of my regulars do not actually want penetration. I think his issue is not so much the sex side of things, but more the fact that I happen to like the company of my gentlemen. That is far more threatening as such.
What strikes me most about what you have said is that the work is part of your lifestyle up to now. Whether it's the actual sex or something connected with it, like the interaction with other people, clients as friends, or something you get out of it as well, doesn't matter. When you meet someone and decide to settle with them, you can't change them, you both evolve into the relationship. So he has to accept things as well as you, and unless you are doing the work in the living space that you both share, then I would have thought the best approach is to carry on with what you are doing until you get bored with it or want a change yourself. Feeling that you should change a whole lot for your partner's benefit is not the same, and although in the short term it might seem the right and a good thing to do, later on in retrospect it won't seem like that. This happens in all aspects of long term partnerships, but you don't see it until you've been through it and come out of the other end. Then it's too late to do it any different.
You're quite right, it's not the sex itself but the lifestyle and the interaction with other people that will be the issue in your male partners mind. Putting a block on something like penetration won't make any difference, so you may as well do it (and in any case my experience is that the majority of WG's who do a lot of penetration are well toned in that area, unlike a lot of civvies, so it's also a benefit as well as the main attracter), just don't constantly bring the subject up. That's what really messes people's minds. Lurid descriptions of how other guys fuck is also a no no, because it sets the imagination into overdrive. The most important thing is to have an active sex life between the two of you, and not be too tired to do it etc when you get back home - not every day anyway! If you can go off to work like a guy or gal goes off to the office or install a kitchen or whatever they do, and then return back to your home environment that will be as ideal as you can get. I've rarely taken my working day home good or bad unless there's an issue like with a difficult work colleague, or being promoted or losing the job, other than superficial things, and a lot of those things you won't face in the work you do. If you can live like that you'll be okay, in other words don't put it in his face all the time.
If you hate the work of course that's a no-brainer, but if you get something out of it, even if it's only the income, then the less changes you make the happier you will be with your situation. And a happy you is a happy him too.