Just wondering if there is a limit on keywords that you can have for your site/ per page?

If you mean keyword density limit, yes there is, I try not go above 30% per page. After that it may look like you are keyword stuffing to google.

Thank You

30% is practically 1 in 3. How on earth are you going to make quality readable content when one in 3 words on a page is a keyword?

Use as many as you need to write good content, a maximum or minimum keyword amount doesn't exist.

What st0x said.

The best thing you can do is write so that people can actually read it. After that, 3% density or 10% or 1% or whatever doesn't matter (and you **** sure won't hit 30%).

What you have should be natural. If the text seems forced it probably won't pass Googles test.