If you want someone to just look over your accounts one for best practices: Fiverr (check not only their rating, but that the ratings are with email and google projects) or interview a few freelancers.
I’d suggest a flat fee from someone with a public profile and a performance bonus: it’ll help align their incentives to yours. So depending on what you want, there’s no magic solution outside of due diligence, regardless of where you find them they should ask:
• What is your revenue and business goal?
• What’s your capacity for business?
• Who are your ideal customers?
• What makes them ideal? Anything I should know about your customers that might be unique.
• What’s your marketing calendar/history like: you don’t want them spending time reinventing the wheel.
• What tone do you want your branding: I once had a guy try traffic-junky (porn sites) for an engraving brand targeting corporations and seniors. It was a funny ad, but completely inappropriate.
Some questions you should ask the freelancers you are talking with. Once you have narrowed down the work that needs to be done:
• What sort of reporting do I get and how often, it’s easy to take the money and run. What is your philosophy for building out and managing Google ads and email.
Do you write ad copy in-house or is that my job?
Best of luck and if you’re still stuck then feel free DM me with some details about your campaign-I can recommend a professional with experience in that industry.