The only problem with personal lease is to get lower monthly payments and affordable maintenance, you have to put down a large amount depending on car of course and still have to pay your own insurance on top. Also depending on lease company they may not be so obliging on minor damage on paintwork due to wheelchair scratching.
Yes I found the same, by the time I made the upfront payment around a similar figure to MB, upped the mileage from 5000 (which the cheap quotes use to make it look more attractive) to 10,000, added breakdown cover, added servicing, added tyres and then insurance it was a huge amount more than the Higher Rate Mobility figure. Only option might be to lease a used car but even then the figures are very similar rather than cheaper than Motability.