2 story 12-plex versus 3 story 16 plex? FLOOR PLANS?

[Casey Marley]

I am some what new to real estate investing. I currently have a 4-plex and a house I am renting out. I am wanting to expand my real estate in the near future and looking for my best options. Would you guys recommend investing into multiple smaller multi-family buildings (4, 8, or 12 plexes) or consolidating units into one 16-20plex building? My thoughts would be that I get better Cash return on purchased price if I were to purchase a single larger unit complex. Although buliding a 3 story complex would require sprinklers systems, multiple exits, and most likely more code regulations.

Also, does anyone have a good website that offers floor plans for 12-20 plexes?