PC.

Flyers are a starting point. Do you have a local newsletter or magazine? I looked in our village one when I wanted some advice re. my PC, and also use it for other things. Advertising in them is usually very reasonable.

I think it may be a good idea to take some advice on insurance.

Ruby
Flyers can be a good way initially, but word of mouth and testimonials once he is established are better. Flyers can be expensive to produce and have delivered, and an advert in a local magazine that gets put through everyone's door might be more cost-effective, or an advvert in local post office windows.
A website too, so people can get a feel of what he's like and what's on offer.

Personally I find it annoying when discounts are offered to particular groups. Your young man will have to make a profit to survive, and if he discounts his services to one group, he will just have to charge everyone else more, to make up the loss on the discounted groups.
The groups you mention are perhaps the ones most likely to use his services, so if he has really discounted his charges (as opposed to charging them realistically and just saying they are discounted to try and get their business, which is dishonest IMHO), then he could end up working hard for very little profit.

Crossed posts Phoenix
Agree re insurance - public liability insurance a necessity I would think.

Here's a link to a gov.uk site on starting up a small business :

https://www.gov.uk/browse/business/setting-up

Your local CAB or Council may have useful info also.
I'd think insurance for himself, as well as for possible injuries damages to others, would be essential.

I don't use Facebook so I don't know much about it but I think some people advertise their business through it.

How about having an introductory rate for everyone, for a limited time?

What about a personal CRB check just for his own safety? That is only a thought.
I would not discriminate between disabled and able, elderly or young, if you start with a charge which must include the cost of any insurance and other overheads which you might have, and an hourly rate which will bring you the money for your needs, then that is the way to go. You are either going to make a go of it at that rate, or you are not. Do not do work for peanuts (voice of experience!) it just does not pay in the end.
Notices on shop notice-boards, a few flyers if you have time to put them through letter boxes, and a land line telephone number together with a mobile number - I think that shows that you do have a base from which you are working.
If you do a good job, people will not object to paying a little extra, and leave your card or flyer behind, word of mouth will be the recommendation that brings you the most work.

I think Public Liability Insurance would be a must. Plus, he'd need to check how he stands regarding tax.

Good luck to him - and you for helping him

I think a landline and a full address are essential on a flyer. We get lots with just a mobile. Also show any qualifications. We have used lots of local tradesmen I like to know where I can contact them. I am not interested in discounts, phrases I like to see., are "no job too small" and "full written quote supplied"

I saw an advert once for a firm called Rent-a-Husband.

'For all those jobs he can't or won't do!'