Panic also increases when your description is broadcast on national media
Early Wednesday, LE released the initial description of the suspects. Once his description was publicized, DM may have realized someone could possibly make a connection to him and the hangar. IMO, this is why the truck was moved from the hangar (where else would it have been?) to Tinsmith on Wednesday (or Thursday)
That description was so vague, it could have fit a quarter of the people in my neighbourhood. Do we know DM listened to the radio, read the news or watched it on TV?
And if the farm is as secluded as Swedie claims, why not leave the truck there in a trailer? There is still no believable reason for moving the truck and expecting better results for hiding it, in my opinion. If they thought the farm was good enough to hide a body on, why bother risking moving the truck? If they thought the hanger was too hot for the truck, why not move the other stolen parts out at the same time? Anyone who thought that a missing man might be tied to them could expect all of their properties to be at least looked over, even their moms house, their associates homes, their places of business and their places of leisure. To me the only valid reason for moving the vehicle would not be to hide it, but to use it as a form of intimidation or to point the evidence incontrovertibly at the one person.
How about this theory; DM takes his buddy MS for a test drive with RBEG, and unbeknownst to DM, MS has a thought like, 'Wow, this would be a really good way to jack a truck, hmmmm'. MS asks the next day if he can borrow DM's phone and his Yukon, and DM, who may be over-generous with his friends, says yes. MS arranges for himself and another unremarkable looking accomplice or two to take the test drive, shows up at TB's, takes him on a test drive, and kills TB when he won't abandon his truck.
After the killing, they panic, and think about what is going to tie them to the crime. And come up with just DM knowing that they borrowed his phone and truck. So they realize that as far anyone is concerned, it could have been DM who committed the crime; his phone, his truck. Why not complete the puzzle and use his incinerator and leave the body on his property, sounds like the perfect cover. (Which would explain why whoever used it didn't know how to use it properly, if they had not used it before.)
And then after some thought, and a few days of worrying about whether or not DM could be trusted to keep his mouth shut about lending them the Yukon and phone, they decided that leaving the truck in one of his trailers at his Mom's house would ensure his silence and or ensure that he would look so guilty that no one would ever believe him protesting his innocence. Which it may well have. And which would also explain his initial shock and later, remorse, and his inability to actually help LE because of his lack of knowledge. And if he didn't know who the other associates were with MS that night, he could very well be maintaining his silence because he knows they are out there and they could be using MB as his hostage to silence.
The only thing missing would be a believable motive; who would believe a millionaire would steal a lemon of a truck, and kill a man for it, no less? Well, what if they could make it look like he was running a chop shop? If one of the associates knows someone who has a few things they'd like to unload, like a Harley they can't sell and some scraps with ground off vins, how hard would it be to dump a small load out of the Harley trailer at the hanger?
To me that plan sounds far more reasonable to a murderer than playing hot potato with the evidence and leaving lots of places where evidence would be pointing directly to them and them only.