Should I stay or should I go?

Hey all,

It's been awhile since I've blogged, so I thought I would drop a quick entry and try to get some feedback from our esteemed community.  As some of you know, my wife and I moved into a house in Sarasota, Florida a few months ago.  This also coincided with me losing my job (read below for details there).  I was able to, through the help of a temp agency, gain employment at a brand-new home health agency.  They own licnesure to operate in seven counties here, and will be opening a second office probably this fall. 

Originally I was contracted to help out with human resources -auditing charts, making sure all the caregivers had proper documentation and were legit to do visits.  Over the last ninety days, I've taken a more active roll in the staffing portion of the office, and creating billable hours for the company.  More and more responsibility has been given to me, and as of this writing, my boss is out of town leaving me to run the office.  Soon I will be going on marketing visits, and ideally running this office with the help of a couple people we plan to bring aboard in the near future.

  My temp contract will be expiring on 6/21, and we will be negotiating my employment offer.  Since this company is brand new, I'm not expecting much in the way of benefits, and that is fine as I can go on my wife's insurance.  What I'm asking for is what do you think I should be asking for in terms of salary?  What kind of BS or fluff words can I expect to be thrown at me?  This is really my first negotiationg experience.  Generally, I've applied for a job, and received it with little to no bargaining.  I have much experience in managing an office as well.  She threw out the fact that she would like to give me a percentage of ownership in the company.  However what if they don't perform well.  For instance, say I only receive one or two percent ownership.  Further, let's say that they make 100,000 in profit.  2% of that is $2000.00.  Divide that by 52 weeks, and you get and extra $38.46 /week which is around an extra .96/hr.  As a safety precaution, I've applied to a couple different jobs in case they try to pull a fast one on me.  I feel with my current skill set, experience, and the current amount of tasks I am doing now I should be asking for around $40,000.00 to start.  Keep in mind that I will more than likely be running this office come this fall. 

Please give me some feedback and pointers in regards to what I should be asking, looking for, and listening for.

Thanks people!