A 2,500 ft? home would require 5 - 15A branch circuits. (2500 ft? x 3 va = 7500 / 120V / 15A = 4.16 > 5 circuits.)
Your first question depends on the circumstances of the room layout. If the hallway leading into the bathroom is within the bedroom, then yes, afci protection is required for outlets in that area. If the hallway is apart of the bathroom, then no.
You can usually make this determination by the flooring and/or entry ways into each area. If the hallway is carpeted, it is probably apart of the bedroom. If it is tiled, I would consider it in the bathroom. A door or header into the hallway area may also indicate a new room, where an open ceiling to the hall wouldlead me to believe the hallway is in the bedroom.
Always check with your local AHJ for their requirements. Don't asume anything in South Florida.