I get it. BUT he isn't saying there are times you can be here and not, as OP is.
He hasn't said at all that OP cannot be at his home, it's that she feels uncomfortable and he clearly doesn't.
So OP has set limits on her home, he hasn't set any on his. OP being uncomfortable isn't really his problem if he isn't and you look at it that way.
I think I'm just seeing it from the BF point of view, that OP sets limits on when he can stay at hers, he sets no limits on when she can stay at his but she feels she'd prefer to have his place to themselves so he's the one having to make compromises and lose income.
I don't think it's as simple as he is prioritising his relationship with the OP when she is prioritising her relationship with him, because she has children. That's completely understandable. She is not wrong. But in them not being able to live together, he is essentially a single person in terms of finances.
And the 'doesn't need the money' argument I keep seeing isn't that valid IMO. Since covid, the Ukraine war etc, millions of people are realising that the money they have or had planned for retirement is subject to unexpected events.
My retired Dad who's in his mid 60s has realised that the savings he thought would see him to the end of his life is likely not to as although his mortgage is paid, his energy bills and food costs have skyrocketed.
I think anyone making as much money as they can through legitimate means whether they seem to currently 'need it' or not are sensible to be honest.