I'm with Adam on this one. I use to inspect a lot of disabled lifting equipment, the commercial lifts go through a lot of testing and development and have many safety features preventing entrapment, falling, fire etc. and allowing rescue in the event of failures including things like power cuts. That puts up the cost but which features would you be prepared to delete? One thing I would say is even a well designed lift can be badly installed, I have seen some very bad issues things like safety systems bypassed because "they just stopped it working" etc. Installing a good make followed by indipendant insurance inspection "should" prevent that.Not really, more a kind of safety thing, because it's obvious that the OP doesn't have a clue about lifting stuff, or people for that matter.
I can just see it in the paper...
"Man kills wife with home made lift made from a cheap Chinese machine hoist after receiving input from a bunch of inexperienced people on the UK Workshop forum - Police are investigating."
It appears that the hoist in question was not designed to be used for this purpose, but someone said it was a good idea for a DIY project and "you should do it like this, mate........"
Not good for the homeowners, advice givers, owners of the forum or the wife.
Edit:
If you've ever taken a Stannah stairlift apart, you would know that it is rack and pinion, not drum and cable.
There's a reason for that.
Hydraulic lifts should be quiet, depending on layout the pump and motor can often be located in a garage etc. I would avoid installations where they are placed in an exterior box as they seem to cause trouble for even some of the better systems. If space and budget allow through the floor is often the best solution and useful even to a non disabled but older partner carrying washing / hoovers etc. up and down gets harder. For insurance you will need the electrical installation by a qualified electrician then 6 monthly LOLER inspections.
I have inspected home made systems some very good, there are people on this forum who I suspect could design and build to a very high standard but the good ones do not look to have been done to save money and the bad are terrifying the phrase "inspection abandoned, unsafe to continue" gets used.
Good luck