As I need to register this business with the state and county, should I need to register LLC as "531110 - Lessors of residential buildings and dwellings" (NIACS code) or something else?

I'd love to explore how I can be a valuable asset to your business strategy.

My wife is a super busy realtor so I took over those duties years ago..

Look at it this way you are opening a new $400k to $2.5M business location and you are going to let it open for business without coming in to go over everything. 

It’s very common in today’s environment that not only are deals too tight for an Agency exit today, but the value add business plan was delayed for any reason whether it was a change in management, slower lease up than anticipated, and now the property is trending positively each month towards Proforma numbers, but needs a bit more life, there are ways to get it done!

- Should I source a consultant or some sort of assistance to devise a business plan?

And based on my business, and from what I am seeing with market activity, it is still very much a sellers market for those type of properties so many investors don't seem concerned about these proposed regulations.  

We purchased it for the purpose of rezoning to commercial and expand our existing business model (workspace rental for people in the creative field).

The market is booming in both the business and real estate sectors.

It has turned into a business for me.