Help this mama get to her sick boy to stand by him in his brave fight!

My son who has lived in Texas with his father for the past 6 years was recently diagnosed with cancer. A rare aggressive cancer of the connective tissue that targets children. He has had an initial tumor the size of a baseball removed but despite medication smaller tumors keep appearing. He is currently in remission but it is not known how long that could last and I just want to support my child and be there to hold his hand and help him be strong! I live in Washington State and currently have no transportation and am unemployed due to health issues both physical and mental. I would love to find some way to earn a little money and be more self sufficient but nothing I could do would be able to come close to what I need to make a trip happen to be with my boy again even just for a small amount of time! If anyone could help with this dire situation and my heart break of not only losing my child but being so far away and helpless while he needs me I would forever be grateful