Hello
Marketing freelancer here too. I think there is always going to be an element of giving a little way, so you can 'prove yourself' and show you have ideas.
If you feel like you are giving too much away, can you cut back? So a silly eg:
Not:
I will prepare a strategy to market your hairdressers to young women who live and work in the area using Facebook ads and a promo person standing on the street.
More like:
I will prepare a marketing strategy for you to reach an agreed target audience. This is likely to be a mulitchannel approach.
My proposals take a while. I had feedback from 2 potentials a few years ago that made me realise I needed to provide a more detailed proposal. I use a template but even so it still takes time to talior it.
I have received good feedback on my proposals but I don't always win the work.
DH works for one of the big four consulting firms, he suggested I consider the likelihood of winning.
A recent proposal was through a recommendation and I was the only one they were talking to - so that was much more likely than the tender I was also given. However, being a perfectionist I am not sure about doing an 'ok' proposal, I like to give each one my all!
Is there anyone in your network you trust that could review a proposal and give you feedback?
I have found tendering services (for clients) really interesting as you see different approaches.
Finally, do you check out potential orgs accounts before you quote? Companies House docs used to be charged for, but they now appear to be free.
The docs cannot tell you everything, but it might help you understand if they can afford you. If they cannot not, then writing a proposal is a waste of your time.
Quite a long answer, not sure if it helps!!