I downloaded the 'Payday' mod. Can you have multiple Hiest Arcades? or is it like a 'choose wisely' kind of deal?

I am trying to re-create kidnapping Mr Weston, but with alot more Merryweather bodyguards patrolling his house, is this even possible? I found Weston and spawned him from 'place ped' but I can't find any Merryweather people. What guns do the guards have in the game? also when I select someone , what does 'relationship' mean?