I hired a property manager with only a verbal contract of 30% commission. I figured out about $10,000 + cost of repairs & services not done. Worth sue

No way to answer such a question without ALL of the details involved including what the obligations of the PM were. That said is rare that a PM will agree to be financially responsible for cleaning and repairs as that essentially places them in the defacto position of a "subletter" and can result in a zero or negative profit situation depending on the property and tenant. Here it seems you indicate that the PM was somehow obligated to pay for the repairs, etc. as opposed to pass the info on to you for you to pay for them. I point this out because some of what you describe might be a financial wash......You will likely need to retain a lawyer to address this properly which might not be viable for a $3-4k dispute. For furture reference  - this is EXACTLY why written contracts are so important.