Yes yes and yes. I just told him the same thing.
80 West (south really, but...)
5 South
10 East
That is literally all the instruction needed to get to Florida on open safe freeways with the exception for getting onto the 80 in Tahoe.
I hope he listens.
Small addenda.
To miss the LA traffic, can peel off at 138, I believe near Gorman, and take it east, it comes in on I ten near san bernardino.
This shaves a few hours off, and circumvents the LA freeways and associated zoo traffic.