I've thought a lot about this topic! I also have a good friend, trained in AMI, who started a Montessori school, and in conversation with her, one of the things she has pointed out is that it is basically impossible to have a "prepared environment" at home. She herself has not attempted such a thing, but, of course, she runs a Montessori, and so her 4 children go there. Anyway, the other difficulty with doing a "Montessori" style curriculum is that there is no formally published curriculum out there. Teachers who are trained in the pedagogy make their own materials and notebooks as they go through the courses. This is intentional obfuscation on the part of hard-core Montessori-ites, who believe that you cannot simply buy the materials and "do" Montessori-- you must be trained. So--- these are the obstacles for a homeschooler interested in the method.
That being said, there are Montessori-like programs out there. I spent the past couple of months hemming and hawing about buying the Shiller math program, which is sort of Montessori based (in certain respects... they definitely don't have the beautiful array of manipulatives that my child had access to the one year she went to our local Montessori school)--- but they have some materials and, best of all, have a parent scripted guide. I just bought it today and will be trying it out. Apparently they also are trying out the market for Language Arts in a Montessori-style curriculum, but I didn't go for that, since I haven't researched it and it's all new. But I suspect that there are some other companies out there who are putting out materials that are compatible with Montessori. Obviously, if you are crafty, you could make a lot of fun materials, and if you have a lockable cabinet to keep everything out of reach when you're not teaching (lest the little one scatter things about and turn them into toys) you could have some fun with that!
The array of materials in a Montessori classroom is definitely eye-candy, and the one thing that gave me real pause in pulling my child out to homeschool. But if you think about it, the home itself is one giant batch of manipulatives, practical life skills abounding. Maria Montessori created these kinds of things for the classroom because she was dealing initially with poor Italian street children whose parents were gone all day and weren't around to teach them these basic life skills that we, as homeschoolers, have the privilege of teaching our children every day in a very organic manner, without much to-do, or formality, or special materials.