Not mentioned:
1. job stability
2. # children
3. health of family
4.how investments are distributed.
$300,000 for a house? Depends on where this house is. What's the condition of the house. Is the value increasing or decreasing.
I have a condo, valued in the Boston area at $350,000. Means nothing really, since the same place if located in Wisconsin would have a value of about $150,000.
Well Off: to me this means $5 million or more.
The couple you described are the American middle class, trying to survive and pay taxes.