Why not rent or borrow a full size pick up truck ( or a crass old American
car with a V-8 and a tow hitch). Go over to U-Haul and rent a 4 wheel tow
dolly.  Then go get your van and tow it home.  You can now take some time
to find a good used engine (or a rusty northern van with a good engine to
be used as a donor).

These techniques should not be very costly and will allow you the
opportunity to either fix your charming camper or sell it in a more
leisurely (better deal for seller) fashion instead of as a forced
liquidation.

Good luck.

Budd Premack
86 Syncro, 73 Super
Minneapolis, MN (Land of Sky-Blue Waters)