I’ve stayed out of this because there is so much that doesn’t add up but I’ll toss out the one that’s bothered me from the start. I think the $250,000 is the loan and the family is paying cash for the rest. OP never mentions a commercial loan and as we know there is no way they would qualify for one. Of courese the teen isn’t privy to all details but it is the only thing that adds up.
And if this is the case, the family has a half million in assets and rental property. FA is irrelevant.