Your better off , if your going to / have to finance , to do so before you become a full timer. While some lenders do lend to full timers they do so at a higher interest rate and with larger restrictions on loan to value and age. Without a hard address they see you as a higher risk ( where can they find you? )
Your moving in to " moms " could also be a red flag as you just moved ..most people I know buy the rig before they sell the house too bad that's not possible in your case.
2003 Beaver Marquis