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try this! http://home.snafu.de/tilman/xenulink.html

realistically, your $300 might get you a single place higher on G, but it might not. dont know what kind of search volume you get, but how many conversions would it take for it to be worth spending the money? unless you're in the top three, in my experience, an extra place gets you a very small number of extra visitors.

for my own and my client sites nothing has been affected.

that will definitely have a negative effect, possibly more than just a minor one. you won't lose all linkjuice though.

do I take it you have caught a domain? is there no way you can keep it on-topic?

Depending on the query, Google very occasionally decides to override the meta description to make the SERPS snippet more relevant. As far as I know there is no way to tell Google to always use the meta description. How relevant is the contact form text to the query?

it may still go back up, my sites occasionally drop for a few days and then go back to normal. never sure why. so I wouldn't panic yet.

your backlink profile could do with some links from real quality sites.

i would quickly add, if you don't have much linkjuice then stick to 2 terms max per page.