To milk for money - the word used literally means something like “cash cow” - an attractive and easy mark.

Taels - a traditional weight unit. A tael used to have a slightly different meaning in different periods of Chinese history. I believe now it means 50 grams; in Tang dynasty it was closer to 37. 200 taels would be something around 7.5 kg of gold

Li - a traditional distance unit. Like with taels, can mean different numbers - now it would be 500 m. In Tang dynasty, if my search didn’t lead me astray, it was around 454 m.

Wow, that’s really impressive - there an idiom was used, lit. “imposing dwellings and spacious courtyards”, meaning a mansion with spacious halls and extensive gardens.