Reading betweent the lines
Take a look at the plate for the VOR procedure (13-1) After exiting the hold at 3100' the next altitude constraint is at LOMAR (same position as LAMBI) at 1600'.
Neither of the plates show the base turn intersecting the line for an altitude restriction at INAT / TUM10.
So, I would say that it would be safe to begin the descent to 1700' as soon as you leave the hold.
However, I would still probably stay up at 3100' until turning inbound since at 11nm the glidslope would be at 3500' so you would still intercept from beneath.