What level of commercial operation can an owner operator goto under FAR91?

I'm thinking of putting my next plane on an N reg. MEP class.

To offset the costs some extra income woud be nice!

If I have a commercial rating, IR and MEP can I :-

a) Offer pleasure flights in my plane?

b) Offer a point to point service for someone who approached me?

c) Allow someone else to hire the plane dry rate and seperately hire a
pilot and fly it?

d) Instruct, assuming a CFI rating.

e) Carry cargo for others

f) Anything else?

RSVP