I am sure your Lender is looking out for themselves vs your best interest. Are you required to used your mom income to qualify for a mortgage, if not then you can sell her home at anytime in the process. If you will need her income to qualify then you can do a simultaneous closing contingent on the purchase of your new home. (In other words you will purchase, sell and close on both home at the same time. This will alleviate the needs to move twice. You can also use this strategy to negotiate a lower sales fee from your Agent.