I did a business plan last year when 1st starting out ... bank took a copy and not sure they even read it.
Good to look back on though esp the financial forecasts pmsl looking at em a year later esp December which was a tad optomisitic to say the least

Just about to do a new plan for phase 2 of H2o as changing bank and want more funding for total north wales / wirral / chester domination (not Wrexham though as Gav owns that

)
Your more than welcome to have a copy of the framework for my old one though and if in no rush a copy of the new one which is a few weeks away as too busy doing windows.
like someone else said though dealer finance will possibly be lower than a bank at the moment depending on how much u want to borrow but typical 4 year flat rate from a dealer should be about 6% to 7% with APR of about 15 -16 ish APR.
Would aslo take a look at a new vauxhall as theyre doing 4 years free finance on new stuff so that would make a 2year old van not such a bargain .... just my humble opinion