Did mine on my days off,so no taking days off work!.And only tools required were a chisel and hammer,don't know why people are always referring to power tools here!,it's a very very simple DIY task were talking about here.Its not a skilled job removing tiles from the floor.
Chisel & Hammer and get down to it,you'll be surprised how fast you'll have them up.
2/3 or 4" chisel & not too big "lump" hammer.