2. Use 2 or 3 layers of liner underlayment (non-woven geotextile) depending on sharpness of edges on bottom of boulder. 3. Don't see how my cost for a crane will help you. A decent size back-hoe might be able to handle it. 1. Setting it more upright keeping the same horizontal orientation, like pic below. I would try to get the flat area on top of the boulder level and slightly canted toward the street.