Here is what you do: GO to court and explain to the Judge that you have not fulfilled your probation fee requirement but it is due to joblessness and homelessness. These are valid excuses. But you cannot just ignore it and wait for a summons or to be arrested - this will be a new charge against you.
On Monday - just walk into court and ask for an extension or waiver of the fees due to your situation. If you ignore this, there will be new charges against you, and they will likely throw you in jail.