it would be helpful to share photo areas you would like to trim, so we can advice accordingly. Lawn mower is only suitable for flat grass surface. I'm using electric from Bosch Rotak, zero maintenance, self suck the clippers, Light weight. Cons is, you can't cut when grass is wet. That's about it. For roadside, i think there will be a lot of stones, i wouldn't recommend you use a lawn mower, it'll damage your blade. You may consider the hand held type. Don't use these hand held type to cut your big lawn, result is uneven and requires a lot of skill, of coz Majlis bandaraya worker makes it look effortless. HAHA