Removing base cab legs

Hi,

I want to install a plinth drawers in the base cabinets. The base cabinets are currently supported by legs but to install plinth drawers I need to replace the legs with side panels. Before I do that I need to plaster and tile the floor underneath the base cabinets which would leave the cabinet unsupported whilst that’s done and set etc. Is there a way to remove the legs without ripping out all the cabinets or them collapsing?