I'm a bit confused - I posted (or thought I had posted) a reply at lunchtime, but it doesn't seem to have appeared. So I'll try again.
I want to say thank you for the replies, you've certainly given me something to think about. Firstly I never intended any offence, to anyone. I wasn't trying to imply that canal boats were a step up from, or some sort of alternative to, being homeless, or anything of that nature. I guess my comment "homes for the homeless" was me thinking that pictures of homes could be sold to raise money to help the homeless. And I'm honestly not wanting to be inappropriate, but I thought that a set of photos of nice looking or interesting homes may have sales potential - and no, homeless people are not the target audience. I've sent my proposal to a woman who helps run the project and had no complaints from her.
But thank you for highlighting to me how a well-intentioned idea can be misinterpreted, or simply viewed differently. I'll try to be very careful how I phrase and present things.
Best wishes.