I'd say the cost of a house you listed in 1965 is right on, we bought our first house in ‘65 for #13,900.
My Mom bought a 1100 sq.ft. 3 BR 1 bath on a slab, with a carport, for about $7800, in 1964.
When I started at Ga Tech in ‘65, they said that upon graduation we would probably be earning $10,000-$12,000.
IIRC, a 289 Cobra was $4,995, an XK-E was about $6,300 and a 911 was $6,995. Those days are long past.