Some things to consider:
What subjects did he do well in, in school?
Does he have a lot of acquaintances, or just a few really good friends? Or one friend who is a stuffed animal?
He sounds introverted from your description, but you have to be really empathic to sell real estate as an introvert.
What subjects does he get excited about?
What subjects upset him?
This isn't type related, but how does he treat waiters and people of no great importance? Because this is how he will eventually see his SO.
FWIW, a lot of SLE's say they want to make a lot of money. Caregivers typically want to "take care of you", but other types can do this, too.
Wait a minute. I just re-read your description of him. He's in real estate and works all the time (Te) and is a stylish dresser (Si) and knows people but is not close to them (low Fi) and is amused at the things you show him you can do and pays for dinner like a gentleman and likes the way you present and wants to take care of you (caregiver) and wants to be the best person he can be for you (Ne) and seems aristocratic (Delta or Beta). I think he is LSE.
*EDIT*
Now, having said that, I'll remind you that I once typed you as ESI.
(I've since changed my mind. Lol.)