Let's clear this up. I'm well aware there is 3/6/9 month upfront cost for a business lease. That is already factored into the £500 per month target. Telling me if I spread the upfront cost over the length of the lease means I end up paying effectively £700 per month will just mean my monthly target budget becomes £700 instead of £500. The budget has already been defined with regard given to an upfront cost being needed.
Next, all the above becomes largely irrelevant anyway as I will highly likely not be using any companies found on the internet. The purpose of finding the offers is to give myself a sense check before I actually spend half a day going to dealerships to test drive cars. If I lease it will most likely be via a preferred company, where even if it is slightly higher cost the increase will be more than offset by the work we do for them, or referred to us via them, to more than offset the slightly higher costs.
Lastly I may even purchase the car. So leasing becomes irrelevant as well. I just want to not waste a Saturday test driving a car which is actually going to cost my business £1k a month because I'm not going to go for that!