It looks like you got some solid advise and I doubt I could really add anything especially if money is an issue. As for the IQ test ... really before age 8 the stats generated are not considered accurate so (personally) I wouldn't retest at this point unless a school is requiring it. When I first stumbled into gifted my gut reaction was that I wanted solid proof of where my DD was at on the gifted chain but got over that pretty quickly and at this point in time, have no future plans on testing unless to meet a requirement for a school. We have one gifted school in our metro area and I really don't see it as an option for us due to the distance we would have to travel every day.
I hope you find a solution and know you have pondered the social preschool choice for a while, but it does sound from your description that your DD might be getting to the point that she is tiring of the simple curriculum and getting frustrated.
