A long time ago my dad got me a holography kit, with glass plates and a single-mode 5mW diode laser module. No optics table, no rubber mats or anything. We just did holograms on the kitchen floor because it was linoleum on top of the house's concrete foundation. Lived on a small road, so no traffic outside, and did it at night so no planes flew over. We'd get the thing set up using a lens, and shining the laser through the plate, where it would bounce back off the object and create interference pattern back on the plate.
All we did for vibration dampening was lay down and not move, controlling our breathing for a few minutes, while letting the laser stabilize. Then, we'd move the shutter out of the way of the laser and do exposures that way.
We got some really good holograms, and after reading about it here and other places years later, I'm really quite amazed, since it seems like people have really bad luck with these without an optics table or anything.
But yeah, single-mode low-power is all you need. I don't know whether 635nm or 660nm makes a difference, this was before I got all into lasers as much as I am now.
