Have I misunderstood something? I'd thought that Adam was thinking of doing one or two at zero cost - not spending his entire life working for free.
How many of us when we first started didn't spend days and days cleaning our own windows playing about with different amounts of different soaps for trad and different squeegee patterns or different techniques if wfp? I know that I did - and I still do from time to time.
How many of us cleaned our family's and friends' windows - and were really happy to get the experience before going out and canvassing up those first few jobs? And wasn't it useful so we could talk knowledgeably to even the first customer and give a sensible price from the beginning?
If Adam had his own conservatory, he'd be spending time cleaning it and getting really good skills and time-saving techniques. Before I did my first one, I cleaned my sister-in-law's conservatory inside and out loads of times.
Give the guy a break, will you?
Adam is going to get two things:
* He's going to get some brilliant photos that he can show prospects. He'll have some whole-conservatory pics, some showing how the glass sparkles when really clean and a few close-ups of algae-covered sills becoming sparkling clean. He'll print them on glossy paper and put them in a nice folder with a description of what each photo shows.
He'll show prospects the bits of grime in the frames of their conservatory and then show them the photos of the jobs that he's done. He'll point out the green lifeforms of the ridge capping and then show them before and after photos.
Because he's smart, he'll continue to get more photos as he gets more customers. He can put these on postcards in shop windows and on his web site as well as on flyers, if he gets a few printed.
* He's going to get valuable experience and it will show when he gives his first quotations.
Adam, I still think you're doing exactly the right thing. The only advice I would give is to do it through family and friends rather than total strangers.
Don't listen to the nay-sayers. If it works for you, then it works for the most important person. If it doesn't work for the nay-sayers, so be it.
Please yourself, Adam - and get the experience and then you'll get much more business much more quickly.
(I cleaned a Farm Shop for free in exchange for them displaying my leaflets. I got at least five regular, high-value customers from that. I'm sure that lots of others have done similar things.)