You are essentially just buying a "frame and a shell", when you buy a step-van... Unless you buy it new, for $23,000 to $58,000
$1,000 will get you new tires... If you are lucky...
$2,000 will get you a new battery, air-filter, oil and filter, transmission-fluid and filter, belts, wipers, spark-plugs and wires, ignition-system and distributor, water pump and hoses... No labor included in that estimate. Also, no tires, which you will surely still need...
That isn't including anything that you may have to do, which could be considered "serious" issues...
- Breaks, often on the last mile
- Transmission, often nearing the end of life, by age or milage
- Engine, often just aged beyond repair/rebuilding (even without a load)
- Shocks/struts/leaf-springs, possibly still the originals and a reason they are selling it, besides the motor issues
- Missing rivets that can't be repaired with exact replacements, as they "popped-out" and need a wider rivet
Then you still have to "build it out", with what you "need", to live, inside.
I just got one for $4,000 and already spent another $6,000 without doing anything for the actual vehicle, except replace one tire that instantly just blew-out while simply doing a slow-speed turn. (Tires are old, but all the tread is there. It just sheared the side-wall and exploded. Cost $400 to have it repaired on the road, because no spare and no jack to lift it, no pump to inflate it to 110-PSI, and no tools to pull the tire off the axle. That was just one of six tires... Also, they didn't have the exact size, so I still need to buy the correct size, or five more of that tire for the other rims.)
I estimate another $4,000 in engine/structure costs for the drive system and body-work. (The engine allegedly only has 70,000 miles on it. {The odometer only goes up to 99,999 miles. I am sure it rolled-over a few times.} But it is from 1981, and looks like every engine I have ever seen in any used step-van.)