I have a Cub 18hp with a 38in deck. Works great for small lawns. I have just started about 2 months ago, so no need to get the bigger deck yet. But I have done a 3 acre yard, and have had calls about a 4 acre yard and today went and looked at a camp with about 6-7 acres. I don't want to spend the next 3 days mowing 1 place so I was thinking about getting a tow mower that is about 42in or getting a 36(?)in walk behind. With the tow I would cut about 6 feet wide in 1 path, but with the walk behind I think it would cut faster. So which is better??