The cheap method of feeding bias to the transistors/fets from one source can be done if each transistor or fet has it's own temperature tracking and is selected for the gain, so that each transistor will work within that range with the same bias, see the Motorola color dots on the transistors to mark them for selection in your amplifier.
Certainly with fets I would incorporate temperature tracking for each fet because they are very liable for run away with changing temperature.