IfWe had the same problem when we bought a neglected piece of garden from our next door neighbour.
Buy a large good quality growbag, (not the cheapy ones as they are too thin & small) spit it in half, straight across, then stand each piece on end, stab it a couple of times for drainage & plant each "pot" with one runnerbean.
If you stand them side by side, (as many as you have plants). you can then make a bamboo or pole structure to grow them up. It even works as a wigwam with the "pots" in a circle.
You will need to feed them something like Tomorite as soon as they flower as growing bags only have limited feed value, and water them copiuosly.
Best of luck.