My feelings are that this is one of the few condo associations in this area that allows rentals and I'm grandfathered in.

Government run economic agencies, The Chamber of Commerce, heavily experienced Realtors in that area, current Housing Associations, heavily involved Banks involved in the local financing may all be successful at helping you to find the right information you need that will help you decide on to what to do.  

Thank you for the heads up on thumbtack.com

That’s things off the top of my head.

The cost associated with completing those corrections should be in the contract, but not necessarily spelled out, but definitely absorbed into the fixed price.Depending on the size of the civil engineering company's design staff, it should take approximately 1 to 2 working-day weeks to turnaround a plancheck if the design was done within substantial conformance of the design standards of the governing agency. 

I can't claim to know anyone off the top of my head, but best of luck to you.

They also have roundtable discussions every night for several hours which can be worth the price of admission in and of itself, the speakers or someone that is a expert in an area heads each table and you basically sit around and have a conversation about certain topics and can ask the table head or anyone else there whatever you want.

For maximum networking opportunities, be sure to  connect with the real estate investors associations (REIAs) here in Metro Atlanta.

@Maciej So, @Andrew Boettcher hit the nail on the head here.

You might consider the IA Landlord Association as well. https://www.iareia.org/BP has a small list of Iowa clubs as well: https://www.biggerpockets.com/rei/iowa-real-estate-investment-clubs/Take these steps and see what piques your interest.