I have not tried this router approach, so I cannot give any recommendations on this particular method, but meanwhile FalkTx have mentioned access point mode for Dwarf being tested and possibility of adding it to next or next-after-next release:
Therefore if you are not much in hurry, you can just try waiting for this hotspot mode to happen, it might be much easier.
As for me, I was personally balancing on the fence between ordering GL.INet Mango and waiting, but it is not clear if MDX is going to receive the same hotspot feature as Dwarf, so I’ve ordered a Mango router, and would share my experience later once I would get it.