'Mr. Blandings' was released in 1948 and, in addition to Cary Grant, stars Myrna Loy and Melvyn Douglas. It is based on the 1946 book of the same name written by Eric Hodgins. It was a fictionalized account of the problems he ran into while building his ideal home some years earlier. The cost overruns were so great that, in the end, Mr. Hodgins couldn't afford to keep the house and had to sell it off. Things end more happily in the movie. Incidentally, the 1980's Tom Hanks film, 'The Money Pit' is a remake of 'Mr. Blandings.'
When they recover from their initial shock and dismay over this setback, Jim and Muriel set about making plans for building their dream house.
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To sum up, I'd say that, despite its flaws, 'Mr. Blandings' is a perfectly enjoyable movie, though not one of Grant's best, and as a comedy, it made me smile but not laugh.