I would think twice before removing a functioning chimney. In a world where energy resources are becoming increasingly strained in makes sense to have a working chimney and a few bags of coal available for as a contingency.
You just look around the accommodation and identify what any reasonable person would consider to be a hazard. Building regs are your friend in that respect. For example a ladder to a hay loft might be a cyclists dream accommodation but if a sozzled cyclists falls through the hole during the...
PLI is good good starting point but you would need to carry out a risk assessment on the accommodation to identify and mitigate any pre-existing hazards as insurance would likely not cover any claims relating to those.
If you allow people to stay in the buildings then the buildings would need to comply with building regs and also having some form of public liability insurance in place might be a good idea.
I have some seriously large laurel, fir and rhododendron bushes and hedges and use a similar tool to yours, but never had much luck with the hedge trimmer attachment. I just use the chainsaw attachment for everything.
I tried to get quotes to remove old Marley tiles and replace with modern vinyl tiles. The moment the tilers realised the Marley tiles were laid on bitumen they just didn't want to know. In the end I did it myself. The tiles came up easily and I then sealed the bitumen with SBR and used...
You would need to hire a qualified surveyor to decide what the problem is and who is responsible for fixing it. You would need the owners agreement for this and if unreasonably withheld then mediation maybe might be the next move.
A lot of the tools you buy these days are brilliant if you just want to hang them on a pegboard in the garage to impress the neighbours but a different matter if you actually try to use them.