I DIDNT do this last weekend on my 2 days off and had to buy a new starter from it freezing. Id get over it, the guy likes his truck and is trying to keep it in good running condition.
im not an expert but i can answer atleast 2 of those for you.
1. It really depends on how dense the nugs are but i can usually fit about 30 grams in a jar.
4. You dont have to burp anymore if you dont want to once its cured. That could cause them to over dry.
I kinda doubt he lets it warm up for a half hour every morning, but diesels are really loud when you first start them on cold mornings and they need to be warmed up. Id do the same thing for a bit in the mornings if i had one. A guy at work has one a few years older but when he comes in that...
Id keep them in the jars under the bed or somewhere dark. If you dry them completely before sealing them for good in the jars then they shouldnt get mold.
hang until the outside of the nugs feel kinda crispy but not until the stem snaps in half. really depends on your temp and humidity so we cant give you a very good answer for how long.