What is the size of my electrical service (pics)

[Speedy Petey]

Hereabouts, every house and mobile home I ever saw feeds a subpanel in the house from a remote drop or underground line that has a meter and disconnect on the pole or post. And usually a space for a few breakers for the well.

This has always been required for mobile homes.

You guys are suggesting that the feed to this panel comes from a remote meter without a breaker on the feed wire?

Absolutely.

You would run unprotected wires 50 or 200 feet from the meter to a subpanel???

Yup, absolutely, if underground or outside. And not to a "sub-panel", to the main panel(s).
Once the wire enters the house there must be a disconnect near the point of entry. This is an NEC code. Your local southwest codes are more stringent.

[ballvalve]

Sounds foolish to me. Hate to hit that direct connection to the transformer with the backhoe!

The only underground cables around here are PO CO owned, 6' deep in a sand bed, from the the transformer,
paid for [ and installed or paid to be installed] by the homeowner, and going to a meter with a breaker for any destination beyond.

[Bobelectric]

100 amp sub panel.