Sell my primary home to buy a 7 unit multi

[Chris Pena]

OK so I have about $400k in equity in my primary residence, I own 3 other investment properties (financed) and buying 4th this week.  I am interested in buying a 7 unit multi but, I don't have the capital to get it unless I sell my primary residence and move into a rental temporarily . I do have a family which will be a pain to move and all but, I am stressing having this equity tied up when I could be using it to grow my portfolio.

Thoughts? Questions? Am I crazy?

Thanks, FYI I am a BP newbie :)