I guess your brew was made of a real potent mixture - of comfrey leaves, nettles and a few tea leaves!!
I saw my plot as a "money saving" venture so decided I will not pay for stuff that I could get free by asking!! I love my plot and take every spare hour I can at it. it's so rewarding and a great stress reliever..
So I set up my whole plot for a few quid..
Shed £50
10 slabs £10
greenhouse window vent £15..
Yes thats all it cost me initially..
I asked and spoke to everyone I saw for stuff suitable for using... stopped at every building site and skip that I saw and gave a bottle of jam to people who gave me stuff. Watched freecycle like a hawk and posted ads for stuff.
Ok then I did buy the odd fork and fertilizer etc.. But no more than a few quid here and there.
So in all my first year probably cost me no more than £250 including transport - (I only live 2 miles from the plot and use my bicycle sometimes).
Now I spend a few quid on seeds, fertilizer, weedkiller etc. Probably no more than £60 a year total cost.
see my blog here
www.gavinconway.net and you can see what I did and needed to get to set it all up. It's amazing what people throw away.. like a greenhouse etc!!