If you can spend thousands of dollars on GPU please always do the same for power supplies to avoid burning down your home, someone I knew put 10 GPUs on a 1000watt power supply and wires melted together which started a fire and did tremendous damage to his farm, the house was safe by the help of neighbours but not the rigs.
Do NOT MANAGE POWER SUPPLY, IF IS NOT ENOUGH TO DO THE JOB RUN FEW GPU's instead.
You are right, it is very important to really look at this issue because it's not just setting it up and you are good to go, you also have to look at the power and how it will not be overloaded because it is very dangerous. And in this example it causes a fire and then it burn and it cost huge money as well.
Or better yet, consult a license electrical engineer in your place to look and see how you can avoid overload.
And still worth to pay them good money, at least you will be safe and your business can continue.