Templates save you money: If you use a royalty_free template, it likely costs less than hiring someone to create a custom graphics package for you. You could easily spend hundreds (or possibly thousands) of pounds on a custom motion graphics opening, for example, whereas you can frequently purchase a royalty_free template for under £200. Of course, the royalty_free template isn't as unique as a totally custom template, but it definitely costs less, and you could always customize the royalty_free template to make it more unique for you.
Now you may be thinking: Uh_oh, I've written business letters, but I've never written a business proposal. Don't fret! Proposal writing is simpler than you think. Basically, you need to introduce yourself, explain what you're proposing and why, describe any costs involved, and convince that boss or prospective client that you can be trusted to fulfill the promises you make. You can find lots of advice on the Internet and in special proposal writing packages like Proposal Kit. Starting with a proposal product like this can speed up the process by giving you pre_designed templates and lots of samples you can learn from to create your own winning proposal.