structural engineer cost/ recommendations (Bronx)

[Michael M.]

I am looking to DIY finish a basement in my house (level floors, sheetrock walls, add a half bath).  The house was built in 1905, and there are what appears to be tree trunks supporting the main beam of the house in a few places.  One of these trees has been partially enclosed in a cinderblock wall.  Ideally, I would like to box around these support trunks with sheetrock and get rid of the cinderblocks.  I would like to have an engineer come in and take a look before I start demolishing things that could potentially knock the whole house down.  Anyone have an idea how much a consultation like this would cost?  Any recommendations?

Thanks!