The OP is at the beginning of this relationship and was very rightly appalled to find out a nearly 60 year old man hasn't an ounce of financial sense.
All this talk of holding her boundaries is fine, but the reality is it becomes increasingly difficult the more involved she becomes emotionally, and the longer it goes on.
She is already so invested after a few months, that despite overwhelming advice to hard swerve him, she is still with him.
She was mother in her last relationship and has walked into a similar dynamic.
The more you become involved emotionally the harder it is to hold the line.
Inevitably there will be a housing crisis and she will be faced with him sofa surfing or moving in with her.
It is inevitable.
The OP has spent decades, her whole life, being prudent, only for her to take on yet another dependent as she faces into retirement.
Ignoring that harsh reality does not help her long term.
A financially stretched retirement having to fund two instead of one is not a fun future to look forward to.
Of course he is nearly everything she could possibly want in a man, she definitely is everything a man with no financial planning could want in a woman.
Kind, generous, home owning, solvent, employed, retirement ready.
The fact he is even thinking marriage is a red flag.
A pre nup wouldn't save her in such a situation.
Absolute madnes.
Perhaps my being 60, and being acutely aware of just how much money is required for a comfortable, not flash retirement.
OP, please be wary. You sound more smitten than ever.