Dodge Help With A Problem Vehicle

I work at Calvary Christian Academy in Cumberland, Md. We purchased a used Dodge 15 passenger van several years ago and have had many problems and one recurring problem.  I believe it is a 2002 model with only 112,000 miles.  Ever since we have had the van, it periodically will not start. We have had several local mechanics try to diagnose the problem with no help.  This past week we took it to Billy Bender Dodge, and they charged us $75 and said they couldn't find the problem either and told our pastor that they couldn't work on it.  My question--is there any way Dodge would help us get the van fixed or help us get a new van for our school and church at a reduced cost?  Our school is in its 40th year and it is a struggle to operate. Hope to hear from your company with a possbile solution! Thank  you! Rusty Kitzmiller  CCA Development Director