Does the building need maintenance which will require the HOA to hit you with a special assessment?  

What everyone needs are products, services and policy structures designed by real estate investors, for real estate investors and one of those features is a portfolio type master policy, with no location limits, with the ability to insure multiple controlling entities and properties in any stage of renovation, in all 50 states, offering agreed value, special form coverage with theft and vandalism, the ability to actually reduce premiums incrementally by aggregating locations AND do it all on a monthly reporting basis so that you and your CPA can easily see the breakdown in coverage and premium for every location. 

They force you to constantly do specials that reduce your profit margins.

We specialize as buy and hold investors who self manage out of state investors in class A properties. 

You might consider Niche or Specialized Housing like student housing.

You might consider Niche or Specialized Housing like student housing.

Those who specialize in REITs don't work cheap and no, you can't do it yourself.

I would have a serious discussion with them and/or a civil engineer who specializes in concrete about how they recommend you lay your baseplates ... trying to secure your framing to the external walls is not a practical approach (i would need to dig into the math to decide if it would have sufficient integrity), beside what will you do for internal walls?

If you only plan on managing an apartment complex that you own or have an ownership share in then I beleive that you are OK and do not need anything special. 

You might consider Niche or Specialized Housing like student housing.