The house of cards was ready to tip over.
When ready refers to incipience, its complement is an infinitival clause. When it has that meaning, a noun cannot be interposed between ready and that clause; ready cannot function as a simple adjective in front of the noun when it has this meaning.
It was a ready house of cards to tip over. NO
It was a house of cards ready to tip over.
When the meaning of ready is "willing and able" its complement is an infinitival clause, and when it has that meaning ready cannot function as a simple adjective in front of the noun.
The fixer was ready to break the law for his rich client.
The rich man had a fixer ready to break the law for him.
The rich man had a ready fixer to break the law for him. NO
The only way that last sentence is idiomatic is if ready has another meaning, such as "competent, prudent, able".
When referring to incipient action, or to being willing and able to perform some action, ready works like the past participle prepared.
The fixer was prepared to break the law for his rich client.
The rich man had a fixer prepared to break the law for him.
The rich man had a prepared fixer to break the law for him. NO