Not sure which is the best option for me

Hi I have created a website for chap who will be renting cars in Morocco, he began by asking if i could just setup an email form which was fine, but now he and his partner have had a rethink and would like to be able to rent the cars online, i.e works the same as the www.hertz.com website, someone uses the drops down menus decides when they would like the car from and to etc, then eventually prebook by paying online.

Now i was thinking of purchasing the powerstore 2 software and using that to do this but as I have never done such a site I'm not quite sure if this is the right approach? (he's happy to pay for it)

Sorry if I'm not using the forum the right way wasn't quite sure what this would come under?

Anyway could you please provide me with some advice as technically the person ordering wouldn't be receiving an item more like a confirmation email suggesting the time and place and agreement etc?...

Hope this makes sense thanks Steve

p.s. oh one last thing does taht person need a special account to set this up i have hear they will need a buisness account at their local bank is that true?

Thankyou in advance :-)