EVAlbum: Vehicle Types and Makes
Is really the best place to start, look at vehicles of the type you have and see what others have done and how much they spent and troubles they had.
My big suggestion is, don't build a car that has a 25 mile range if you need to go 25 miles and if your 25 mile range is at 80% discharge then you will kill your batteries in just a few years so make sure that you are above 50% discharge in your daily use with a stop or two on the way home and you will get the most life from your batteries an you will use your EV for more trips.