@Separatingornot Are you still reading and are any replies helping?
It would really help if you told a little more.
I don't see how saying what your H does would be outing. IF he has one of the jobs mentioned here, there are millions of men doing those jobs. You don't need to give a location.
I began to wonder if he was high profile like the church or even the Royal family! :)
In real life, if you do move out, everyone will find out anyway.
Have you talked it over already with close friends? Does anyone know what you are thinking over?
The way I see it is there are two issues.
The first is the downward slide of your marriage over 2 years and the second is you don't like living 'on the job' and never have.
Without knowing your ages, it's really hard to help.
If you are in your 50s, retirement for him may be in sight.
As someone who is a former therapist said here, moving out is NOT going to improve your marriage. It's a step towards divorce UNLESS he is happy to have that kind of set up. (But that doesn't address the other issues you say are bubbling away.)
I have a friend/ former colleague who, when he married late in life, kept his residential job in a school where he'd been before he met his wife. They bought a home and he went home at weekends and she stayed at the school occasionally. That worked for them.
For you I think the issue is not so much where you live but if you love your H and can get your marriage back on track.
I think buying is a step too far- move out and rent for a while maybe and see how that feels.
Are you itching to live your own life, do you work, do you want to start dating other men?
So much we don't know as you've given a minimum of info.