Help Quenton Create a Home for Madison

My name is Quenton and I have two children Madison and Theron. For the last 2.5 years they've lived primarily with their mother and visit me during the summer and holidays. Just before her 16th birthday Madison began to have constant issues with her mother and threatened to be kicked out multiple times. Since she has asked to live with me full time so we are now looking for a home to rent (I've been full time RV for those 2.5 yrs) but will need to furnish a room for her once we get a place. Any help as we make this transition would be so appreciated.