Concerning the lodging I know that some hotels in the area of hospitals give a preferred rate to patients and families. It is still not that cheap but better than regular rates by quite a bit. Social Worker at Princess Margaret should have that information and maybe other suggestions also.
Regarding the PEG tube placement I certainly would raise that with his RO before he starts treatment as he is at his strongest now. If he later requires tube feeding the pump and supplies are provided through the Home Care Program for 2 months time and can be extended if needed.