Having a professional forester working with me was defo the right move - it may have cost me around 1000 EU means he's probably worked at something like twice the rate I've been working!
I've seen quite a few people go wrong with this. Many are penny wise pounds foolish and will rather exhaust themselves doing a botched job than pay for professional service.
A good job is well worth paying for, I learnt that when I got my kitchen worktop done this time last year.
Although I could have done this myself - mostly - I was just under time pressure with fire season looming!