Gas Power auger recommendations

Since I have to re-do our fence, as well as extending the deck...deck NOT (d**k) I checked out some rental places for a 1 man gas auger. We are looking at $80-100 a day. Considering the fence and deck wont get done in a day, its going to be a fair amount of $$ for the rent. I used to work for a rental house, so I know I can get a better weekend/weekly rate, but still going to cost a bit. There is one made by Earth auger, I was wondering if anyone has any experience with them or with an power augers?? I have probably about 18 holes to do, and would like to get a 10" bit. I need a 10" bit as we will be using 8" sonotubes to saddle 4x4 posts on. Recommendations?? Here is a link to lowes that carries them, also TSC has them, but up here they are pricey...Im thinking buy in the US as some places offer free shipping within the US8-)

Heres the link
http://www.lowes.com/pd_41644-1339-...0__s?Ntt=auger&facetInfo=&state=R#reviews_tab