Good soil tests for ex-lawn to garden lot

I just inherited a small lot of lawn behind my house and I would like to use it for a small garden. I have no idea about the soil type in this place and it doesn't seem like any of my neighbors are doing gardening. I looking for a good home soil test kit available on the east coast of US (Boston) area. By good I mean combination of low price and pretty reliable, comprehensive. I'm pretty good with Chemistry, actually I used to work in different analitical labs. The problem is that analysing sulfur content in steel is not the same as purely agricultural testing and I don't have any equipment or chemicals at home.

My land is adjacent to wet lands and I spoke to a conservation lady here. She said that she grows her veggies in a wooden frame placed on the lawn with top soil filled in. I guess that's one way to do it, but that's a lot of top soil.