[Justus]

FRS is one half watt (1/2) and not capable of using an antenna on the roof (FCC regs)

MURS or GMRS would both easily cover 1 mile with a rooftop antenna.

You'll spend about the same on radios and antennas for either service.
GMRS can use up to 50 watts and
requires a $80/ 5yr license but allows the entire family to use
the equipment.

IMO, GMRS is the better option:
1) antennas are smaller
2) there are usually repeaters available
3) the option is there for more power.
The bubblepack Midlands and Cobras aren't repeater-capable but
ICOM and others manufacture commercial quality GMRS equipment.

As far as equipment:

Google: Dakota Alert
They specialize in MURS equipment.

You can use a good grade of handheld radio as a GMRS Base station.
The ICOM F-21 series have detachable antennas that allow the use
of a rooftop antenna, they are 5 watt and can operate from AAs, NiCAD
packs or a 12V power source.