Hi @Andrey_Malk
I unfortunately do not know of any other financial supports available to you. Under certain circumstances, you can be issued with a WBS.
It is also up to you as a family to decide how much of your income you are willing to spend on rent, and up to a landlord to decide whether this is reaslistic. There is not a particular limit to how much rent you can pay.
Best,
Éanna