But realistically, the bed isn't going to be running full tilt
for my setup. the bed will be full tilt during print startup until the desired temp. during this time all others are OFF. when the bed reach temp, the next thing is hotend, and then printing commence, its sequential not parallel, from thereon bed and hotend will be on and off just to maintain the set temp (pulsing current). hotend maybe working hard to compensate for the leaving plastic (heat loss), but bed not so much i guess, depending on surrounding temp, if one keep it enclosed, bed heating can be relaxed to some degree.
Because a "premium" regulated 240W smps goes for 20$ while a 150VA transformer goes for 30$, and you need regulated 12V nonetheless.
where do you get >360W 50/60Hz transformer (12V x 30A) for $30? thats cheap. not to mention its weight, i dont feel like moving around 3dprinter with its separated but wires connected 7kg worth of metal.