Absolutely. A lawyer is an advocate whose sole purpose is to provide a proper defense while protecting your Constitutional rights. You want knowledge, experience, strength, directness but most of all you want results.
Never, it should not cost to know their rights.
Generally no.
Absolutely not. The state has the burden of proving each and every element beyond a reasonable doubt. My job is to ensure they are held to that standard and all protections afforded under the Constitution.