Rent control obviously in the cities that have it.

If you have a 20 year timeline, I'd probably recommend B areas closer to the city or in the better school districts in the suburbs for the highest combined ROI over that time period.Right now you can expect to find decently turnkey multis for about $60-$125k/unit usually all at least hitting the 1% rule in that range.

we have had a bit of a roadblock since the duplex are listed in the city as two single family homes. we have had evaluations done before and they are worth twice as much after the repairs. do you guys work with credit of 640?  

Wholesaling works different in different cities, people will come on saying get quotes and all this but in Phoenix you have to move extremely quick if it's a good deal.

I'll just add a local perspective: North Atlanta ie city, Sandy Springs, or Alpharetta?

- Any major restrictions or city regulations I should know about?

Out of state investing in cities within a reasonable driving distance may be a good option. 

Does the city allow it?

I am an advocate for Philadelphia, particularly for those like yourself who are local to the area with knowledge of the city.

I can become a millionaire just by looking at street and sat view and bid online in my underwear.