Here is a list of things I think others and myself would reccomend you do before jumping in and making any big decisions.
1. Read back about a year in the General,Newbie,Newbie Faqs,Truck Talk, and Recruiter forums. Read the ones that the title grabs your attention. This will help you ask more specific questions.
2. Read TerryandRene's recent post that is titled "2000 miles in a cargo van". That may not be the exact name of the title but it's close, and I think it will be a benenficial read.
3. Talk to as many cargo van/sprinter owners that you can.
4. I would seriously think about driving for a fleet owner before buying my own ride. This way you have a fleet owner with experience backing you up.
5. Make sure you have a good cash reserve fund. It takes a couple of weeks to get your first check, but you still have expenses.
Just rememer take plenty of notes, and do your homework. I'm going to be truthful with you. If you jump to quick it may not be long before you are trying to get someone to take over the payments on the truck. There is alot to learn in the industry, and trying to learn it after you have a truck payment is not the time. Be prepared. This may not be exactly what you were looking for, but I think it would be better for you to have others assist you in finding the answers to your questions instead of just giving you an answer. Others may disagree, but these are my thoughts. Have a good day.