Tonight may have been one of the most up-and-down races ever for JR Motorsports co-owner Dale Earnhardt Jr. The NASCAR Xfinity Series can get really expensive for a five-car team. Dale Earnhardt Jr. is going to welcome home a winner in Justin Allgaier. However, Sam Mayer, Brandon Jones, and Carson Kvapil were all wrecked during the course of the race. Kvapil suffered his wreck on the last lap of the race. That wrecked is also the thing that allowed Justin Allgaier to claim the win. So, you could say it’s all about balance. For Dale Jr. it’s more about his bank account balance. “You enter 5. Wr…