I think that based on the fact that WB3.1 will work and I can get my WHDLoad files to work with that - I may be on to a winner 
Very expensive winner. When you add the cost of the MiniMig, some sort of case (even if it is just two bits of plexiglass), the ARM upgrade, the RAM upgrade you are talking mega money compared with an A600 + HD
Add to that the fact that MiniMig is not 100% compatible with all Amiga software (yet). Core updates have slowed to nothing also.