what mower to get

I am looking into starting a mowing service and would like some insight on the does and don't. I have read a lot of opinions on commercial vs residential 21" mowers. I am leaning towards the lighter models. I have read some good things about craftsman mowers but that was a consumer report. I would like to get a good bag mower as a plan on mostly bag. Also a weedeater I am looking at a still. any kind of info would be great. will be doing about 10 lawns a week. Thanks