Going out to buy my 1st commercial trimmer. At this point Im not looking for but Im sure I will eventually want an edger and maybe a de thatcher. What do you guys think about the machines that have the trimmer, edger, dethatcher etc. attachments? How cost effective are they compared to buying separate tools. I know echo has this equipment, Im sure others must also. If I do go with the attachment route what would be a good machine ?