The cost includes everything, including the cost of all the equipment needed to grow indoors amortised over its life time...lights (full spectrum budget LED) , AC, dehumidifier, air & water pumps, wall & floor fans, EC probe, pH pen, pots, pipes, etc., over 5 years....pH probe 1 year and all consumables for one grow, nutes, coco, pH probe storage and calibration fluid, suppliments, mason jars, etc.. Most of the 5 year equipment will last much longer than that if maintained properly.
I did not include the cost of internet or the cost to purchase any automation gear or the cost to build the room, eg., wall linings, flooring, shelving, water tank (I got that for free), insulation & and I didn't include the cost of the silenced extraction fan or carbon filter as I'm not using them.
The cost was actually between US$23 & US$30 per ounce of premium bud. It varied depending on what was being grown in how much space because I've flowered in different sized areas using different wattages over different veg times and ambient temperature, so cheaper to grow in winter with lights on overnight than summer lights on overnight. If i did it with lights on of a day electricity charges would substantially increase.
I buy my nutes in bulk and get them pretty cheap. I don't say where I buy from or what I use to protect my privacy and because I do not want to endorse a brand when it comes to nutes. Nutes are more marketing crap and big retail mark ups more than anything else really. I don't use bud boosters as they are either bullshit marketing or harmful for your health or produce lower quality flowers.
The biggest cost is electricity.