You want to prioritize your financial structure. It is apart of the foundation of your business and will cause a lot of harm if you aren't hands on about it. Yes- Get one-on-one help from a financial adviser or consultant. If you want to get a CFO, make sure they are are not just capable- but are committed to your company's success. Having a CFO long term will be likely be the best option.

Personally, I am currently assisting a friend of mine with her start up company and her lack of financial structure is a source of conflict. You cannot expect success without planning for it, it's a part of the bloodline for your business!

From a cultural perspective, I can provide a few thoughts

Pros
-You can get some of the immediate work done that you mentioned without risking a bad, quick hire
-A consultant might be able to provide you with a current state analysis, helping to determine key factors of your hire (type of work needed, experience, etc.)
-If you trust this consultants options, they can support you during the interview process to check for industry skills/knowledge

Cons
-Potential on-boarding and support time of someone who will not be with you in the long-term
-Potential bad culture fit giving your current employees a bad taste for what the role can do for the organization
-Poor optics of investing money in an outside resource in a small organization

I hope this helps a little. Good luck!