Are unemployment benefits exempt from garnishement?

Unemployment benefits are exempt from garnishment.  However, your account can be frozen until you prove that the money in the account is from such benefits; to the extent that they are not, non-exempt funds can be seized.  Therefore, just make sure to only deposit these benefits into this account. And be aware, the process of unfreezing a bank account can be a tedious and time-consuming process but it can be done. 

As for your home, yes a judgement could also result in a lien being placed against your home.  The creditor can go after any non-exempt property in order to satisfy its judgment.  When you sell or refinance it, you would have to pay off on the judgement at that time in order to get the lien removed.

As for the statute of limitations, judgements are only could for a certain period of time.  After that, they have no legal force or effect.  This period varies from state-to-state.  In PA a domestic judgement is good for 5 years.