You can have as many links from your personal site to your business site as you like and wherever you like. You will not incur any penalty that I know of by putting links to your business site on every page of your personal site.

How much good such links will do your business site, especially if the two sites are on the same host and have the same ip, is questionable, but it will not do any harm that I know of.

And anyway, as it is a personal site, then linking to your business topics is relevant and personal to you, so it makes sense to do so I would say.

I cant see how it could do any harm at all and you have the right idea to use relevant anchor text, mixing up the anchor text is also a good idea as it is more natural than 20 links all with exactly the same anchor text.

If you use google webmaster tools, then there is an option there to see what Google sees in external links to your site, so you can look later and see whether those links you place with different anchor text get registered by google.

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