AITA Giving and getting nothing in return

AITA To begin, I purchased a house for my son and DIL. Son works in family business and the house payment is part of his salary. I spent $30K in Reno that he is paying back to me on a weekly basis. We agreed to a payment option and also to: that if he ever has the opportunity to pay it all off at once that would be great. He has paid over half of it back (which I appreciate) and still owes $10K. His wife has recently got $40K in inheritance. I asked for the remaining amount back because they have the money. Son proceeds to cuss me out saying I am disrespectful among other things. Now keep in mind I spent 4 months by myself renovating the house, did not ask them to pay for any labor. I even purchased a $7000 lawnmower (it was a gift) and so many other things. All I asked was to get my money back and they refuse by saying I’m just like a vulture; “I smell cash like a vulture smells roadkill.” And all I think about is money. Funny thing I didn’t hesitate to give them over $70K to get moved in and spent hundreds of hours making their house a home. But I’m the a$$hole.