Brew Kits cost anywhere between £8 and £40.  Usually make ~ 40 pints.
Not including the cost of the equipment, your pints will cost between £0.20p and £1.

We have gone for middle of the road "two can" kits. 

This stuff is so easy to make.

1. Clean and sterilise all equipment. Remove label and stand can(s) in hot water for 5 minutes to soften contents. Pour the contents into the sterilised fermenter. (plastic bucket to you and me)

2. Add 3.5 litres (6 UK pints) boiling water. Add 16.5 litres (29 UK pints) of cold water to bring the volume up to 23 litres (40 UK pints, 6 US Gallons) and thoroughly mix to make sure all the contents are fully dissolved.  This is easiest if you pour it into the cans you poured the malt out of, as the boiling water loosens any leftovers in the can.

3. Add the yeast, cover the fermenter and leave to stand for 4-6 days in a warm place (between 18-20 C, 65-70 F). Fermentation will be finished when the bubbles cease to rise (if you use a hydrometer, when the gravity remains constant below 1014°).  (we use a puppy mat and a proper homebrew immersion heater)

4. Transfer the beer into bottles or a pressure barrel and add half a teaspoon of Light Spraymalt per pint to each bottle, or a maximum of 85 grams (3oz) per 5 UK gallon pressure barrel. Sugar may be used instead. Stand bottles or barrel in a warm place for 2 days then allow 14 days in a cool place or until the beer has cleared.

If you're a beer nerd, then Light Spraymalt may be used instead of sugar for priming which will ensure that your beer complies strictly with the 15th Century purity law, the Reinheitsgebot.

Light Spraymalt = Malt Extract?

If so, that's cheating. 

When are you going full mash, eventually you need to go full mash or GTFO imo

It is the plan, but at the moment I've got better things to do with my time than spending six hours boiling my hops.