buy another 2 sprinters tidy them up and sell them then you will have $7000 to spend on your car.
my real advice is to wait and drive it. search high and low for awhile and get good quality secound hand parts for cheap eg wheels,engine,shocks etc{bargins do come around if you wait}, and get the parts together and then start.take your time and you will save lots of money and have a shit hot sprinter. go on cruises and the like, ask lots of questions of people of the forum about suspenssion,wheels and engines that have a spinter and you will have a better idea before you even spend a dollar.
mick