ebay is where to get a bargain font/tap set up be patient and wait for something in your area as they are heavy and bulky items. Ex pub 2nd use bargains exist, branded fonts and taps will be the cheapest but with patience you should get something ideal eventually, my brass 4 tap font cost me ã50 and a 50 mile round trip to collect..
dont be put off by a bit of grime, you will strip n clean and sanitise it before use anyway
kegs your looking at ã35-ã85 each (2nd use depending on condition..)
beer and gas line ã15 will buy you more than enough to plumb up with enough for a re do left over, and again..
upto ã30 or more on JG fittings, for a multi keg system with split gas lines and anti fobbing pressure reducing 3/16" microline lengths you start needing quite a few, plan your plumbing in advance and you may find it cheaper to buy a bag of 10x a fitting than 3x individual fittings..
basic welders regulator ã30, just ensure its output dial is in psi and uses a readable gradient, with corny kegs you dont need a fancy brewers reg with a built in prv as each keg has its own prv fitted unlike the commercial sankey equivalents..
ã25 for a 2ndary regulator if you want to serve at 2 different pressures, But will you If all beers are kept at the same temp they are going to be all conditioned fairly equally, my advice would be to fly without to begin with..
temp controller for fridge Circa ã40 stc1000 + box or other
if the fridge needs heating at all ã25 for a tube heater.. (only needed if ambient temps drop below the ideal beer serving temp)
ã5 pc fan and dc power brick (keep air moving inside the fridge..)
If you use a freezer instead of a fridge just be aware they are not intended for use at temps above the freezing point of water and dont have any drain facility, so condensation can pool and if the foil surface of the insulation gets damaged water can get in and feed fungus and algea growth YUK!! however a towel left in the bottom to soak up any condensation for regular exchange is a cheap n easy solution..
PS when cutting beer line use a sharp blade and not scissors scissors will squeeze and deform the tube first and the resulting cut will not be square, and when inserted in a JG fitting will not sit flush and can result in a neucleation point to start a foam out and if done is a real bugger to trace back to and find..