The devil is in the details.
obstacles?
lawn size?
terrain?
exercise?
health of the operator?
quality of the task?
the future?
economics?
Now, for me
This task must be done well, no clumps, no scalping , little wasted time..
.5 acre
many flower beds, many buildings,ect
rough terrain
72 years of age
health problems
Solution??
Two mowers?
One with swivel front wheels ?
Or , the Toro 30" one on steroids...