Experienced E 30 mechanic on the north side of Houston????

Restoring my 1985 325E.
After it get it all hooked up, I still might have trouble shooting problems.
I donít just want to drop it off at a regular mechanic to pay by the hr until they find whatís wrong.
Does anyone know of a good shop on the north side of Houston Texas ?
Please send address and contact number if you do.