Ok, so 7 hours. But is that with ONE 36" mowers or TWO 36" mowers. Systems, order of operation and equipment makes a huge difference. Lets look at the definition: Order of operations means, what happens first, second third. Argue how you like, but: Trimming BEFORE mowing takes more time, period. Same guys who mows an area, trims the area is also faster, because he knows the area and hasn't left something behind (like a swooshed corner) for the other guy he's not going to do that to himself (at least not after the first few times) so the order IS MOW, TRIM, BLOW. not TRIM, MOW, BLOW. Systems is following the order of operation, Making sure the two cycle mix is always in the same place, whacker string is always done X way, etc etc. saves a lot of time in the long run. Want to afford a new truck? Buy a Velke. Two 36" mowers on velkes will rock the world of mass small mowing. Now lets talk about these shrubs There is NO way anything, except driving by the house to give a nasty look , takes 5 minutes. It's going to take longer. But its 25 houses 3 times a season, NOT every single visit. Don't cry over spilled milk, it may reap you benefits down the line as people realize they want their shrubs done too (but now have to pay_ So consider it an investment. Do those free shrubs like someone paid you $1000 to do it. They need to look awesome. Don't fly through them like they mean nothing to you. Because you know what YOU are paying for the privilege to do those shrubs. so do them nice. Not every investment reaps benefits, but you are committed to the investment with no refunds. So give ti all you got. 3 times a year isn't going to kill you all that bad.