Enable my cancer stricken wife and I to travel

My wife(we have been married 41 years) has been battling stage 4 breast cancer (spread to her brain, lungs, liver and spine) for over 4 years. Surgery first along with medication followed by over 2 1/2 years of chemo so far. The photo is from her first chemo. She has now had 47 of them along with 18 radiation treatments on her brain. She has difficulty walking or standing.  She has short term memory issues and cannot go for any decent period of time without needing a restroom urgently. As a result we are confined to home or places very close by. I would like to get a good used travel trailer or drive able camper type vehicle so that we  could at least get out more (something small that can be driven  or something that my 2007 truck could tow easily). She will almost certainly be on chemo for the rest of her life and that means every three weeks for treatment. We are on a fixed income (SS for me and disability for her) and financing one is out of the question as we simply cant afford it. I realize that our situation is not unique and that others are perhaps more in need of things than us. I just wanted to try and see if I could make her life a little better. As a side note I highly recommend City of Hope Hospital in Duarte California for anyone who has cancer or has a family member suffering from cancer. Thanks for reading.