In my opinion it will work but you will be disappointed with the results. If LM3915s are still available (they went out of production around 1995) they will give you 30dB per device range but only in 3dB steps (10 LEDS x 3dB = 30dB) so it will not be particularly accurate. Cascading them will not improve that but it will make them more prone to noise. If you consider the worst case scenario of all LEDs on, the display alone will consume around 420mA so you would have to be extremely careful with power distribution and regulation to achieve stable results.
There is a huge difference between the 'hamradio' design and the AD8307 design, The 'hamradio' is suitable as a local field strength meter or for monitoring the output of a power amp, it needs volts out of the detector, but the AD8307 is sensitive to much lower signal levels.
Brian.