I would talk first to an electrician as many do fire alarm and life safety.

Even if we didn't renew the tenants when the leases were up or if they had their own renter's insurance policies, we felt it was a bit too risky.  

Prioritize Safety and SecurityRenters value safe areas.

Later on in your investing journey the safety and low management of expensive, appreciating properties will become appealing.

I am aware that since I’m renting one unit out I need a landlord policy, but can my policy be HO3 or does it have to be DP1? 

If a person has RCV or ACV policy makes a huge difference, than question of what coverage level people had and if they had policy add-on's that cover cost over-runs and all that fun stuff, not to mention contents. 

Also make sure to have owners add you to their property insurance policies, so you have liability protection. 

I'm excited to see so many of my peers in tech, prefab construction, government policy, architecture, et al come together to try to help those who need it!

Assuming you don't have a mortgage that requires a certain level of insurance, you can get a stop-loss policy covering all the properties. 

look for land with owner financing And I am sure you know this but location and safety will be paramount in the Jackson market there are simply areas the crime is far to high for this to be successful..