The first thing to do is make sure your equipment is where you want it to be, then run extension cords (short in length and as heavy duty as possible).

At that point, you have a good roadmap for an electrician to work from. Although heavy duty outdoor type extension cords, in the 10-foot range, might do you as much good as an inside wiring job.

Most household circuits are 20 amps, so depending on what type of equipment you have, you should stay under 18 amps.

Some equipment, like older TVs/Monitors or things with big motors, canse a surge when turned on, so allow for some "headroom" between 18 and 20 amps.

You can count amps by looking at the label on the gear. You can count amps, or you can count Watts (20 amps can be 2000 watts in rough calculations).

Remember that a transformer is always 'on', even if you don't have the other end of the transformer plugged into the device that it powers. if you want to save monthly bucks, put your transformers on a switched plug strip, and turn it off - all of them off - when you're not using the devices attached. A $5 plug strip can save you $5/month!