I would take Trip Advisor's reviews w/ about 7 or 8 grains of salt. They're not known to be the most accurate, from what I've heard.
Anyway, Hotel Kingdom has the Comfort Suites on Conway Rd, 1 mi from the airport for 7/11 for $62.97/night. I don't know how that compares to your rate at FI. CS has a free aprport shuttle if you need that.
EDIT: had to change the price. The price I had was for June 11, not July. Sorry!
Also, there is a brand new Best Western at the airport listed for 53.81 std room, 68.70 std suite.