Can anyone recommend some good licensed contractors to put in retaining walls and concrete work? We just purchased our home last year and there is a lot of work that needs to be done inside and out, but because my husband and I have had - between the two of us - 23 knee and abdominal surgeries, there is not a lot we can do ourselves. Right now our propane tank is sinking into the ground, the box around it and the asphalt near it are collapsing and sliding down the hill, and the retaining wall holding up a derelict pond has failed. We're looking for someone who is trustworthy, reliable, affordable and who does quality work.