Since you run reefer, you ever think about running jumpers from the reefer battery(run in constant), to your charging/jump post to maintain your tractor batteries? Old trick we used at my first reefer company.
Can't really comment on Mavericks trucks but if your looking at used fleet trucks and interested in a Volvo 670 climate express does good maintenance every 15k not sure if they have any trucks on the market currently just thought I'd throw the info out there they are out of stock Louis by the way so might check around there