If you want to recreate the sound of an era try mimicking the equipment they used to recreate it.
For rock and roll horns can't be beat.
Grateful Dead used Altec A7 and Macintosh. You could recreate the wall of sound with several pairs of Crites Speaker Type CS Style B and still be way under budget.
Klipsch La Scala would be worth looking at
Volti Rival would be another consideration.but a little over 15K