Tennis courts are HUGE. You need about 8000 sf per court and it can only be used by 1 pair at a time. It's a ton of space to build, maintain, and heat for just one court that will only be used 5-10 times in a day.

If you have studded tires I would probably wait a bit longer but it depends on where you live. Legally you are OK anytime after October 1 but studded tires + bare pavement = poor traction, so if you realistically don't expect to be driving in snow for another month I would stick with your all seasons. If you are talking about studless winter tires, yeah go ahead. They do well with cooler weather, rule of thumb is to switch them when averages are 50 °F or below.

Most locations seem to have only Pfizer or Moderna, not both. If you are being precious about which one you get you may have to travel further.

5 and 6% are both common but it does vary somewhat. If you don't like the contract the agent proposed, bring it up with them.

Sorting packages at a central location is incredibly efficient. If they didn't do it this way they would have to drive trucks between every pair of towns.

I would let the pros make the call on this. What is some random anecdote from reddit really going to help.

I think this is just a giant waste of time. Buy oil when you need it. 100 gallons at a time seems like such a hassle and waste of effort and there is absolutely no reason to think you will come out ahead.

I don't see any point in trying to speculate about oil prices. You will never be as good as the pros who do that for a living and have already set their prices accordingly. You are at 1/4 tank... buy now.