when is the best time to decide to purchase a bigger mower? right now all i use is a 21 inch. do i wait until my schedule is totally full to justify buying a 36 inch, right now i have 20 yards, of which half are good size that a 36 would be real nice. do i wait until i can buy one out right? I'm having trouble deciding this. i WANT a 36 inch(and it would make my work a lot easier) but when can i justify it, when did you justify it.