The clearing broker I mentioned require $10mm or more to get clearing.
Accounting/regulatory can run for a single member $1000 to $1500/month
Actant Quote is about $3500/month plus non-display market data which could run $12K/month plus hosting.
Exchange trading permits are the least of your problems.
Thanks for the reply, Bob. I was more asking to see if there might be cash equities traders out there running a bare bones option MM set up to take advantage of the 60/40 tax rates. Maybe do some selective option quoting and the rest in low delta strikes or sit outside NBBO on names with small daily ranges in order to hit quoting requirements. No actant or market data fees necessary. It's probably 1) not legal and 2) not practical but people have done all sorts of "creative" things over the years. Wouldn't fit me, just found the possibility interesting...I'm sure if it's being done, you would know about it.