I assume any defensive structures built these days are temporary and are only for practice lasting the duration of the exercise.

Headline is pretty clickbaity

Tanks, infantry, medics and engineers are pushing east from their base in Adazi, Latvia to take part in a multi-day exercise. …
Russia has also been conducting similar military readiness exercises across the border.

10kg of muscle is not an insane amount for a 193cm man to put on. Especially when he weighs over 100kg

Probably a love hotel. You can rent rooms by the hour.