First thing, you don't need 240. Plenty of us, including myself, use two separate 120v circuits and two elements to power our brew rigs. I boil 7.5 gallons easily with 2x1500 watt elements.
Some will say 240v is the only way to go, but I'm not one of them. The argument for 240v usually includes speed to mash and boil temp. My brew days are usually 3.5 hours or less. If they got much faster I wouldn't have time to weigh out hops and clean up as I go along.
And to answer your question, yup it's that easy. Buy this...
https://www.brewhardware.com/product_p/hotpod-ewl3.htm
Add an element(s) of your choosing, some extension cord to hack up for the wire. Drill a hole with a step bit or knock it out with a punch. Might want to buy a bulkhead and valve assembly too. GFCI outlet adapters for 120v outlets are super cheap.
Buy a cheap 24v pump, some fittings and hose to circulate the wort around and you're good to go.
Then you can order a pre made controller or diy that too. I prefer a pre made controller, but that's mostly because I don't have the time to figure out how to make one myself.