Skoda Octavia Mk 3 68 plate - Tow bar rcommendations, fitting companies, etc.

TLDR

We need to get a towbar fitted to take a 3/4 bike capacity rack that we have already. What tow bar kit to get and who to get it fitted? Local garage? Halfords? Local or natioanal travelling fitter company? Local indispension trailer dealer?

We recently got an ex MOD octavia base model but it is fuel efficient and does what we need. Except for the tow bar to take a three / four bie capacity towbar mounted rack. So we need a toww bar fitted. Last time on our van we went to the local garage but we have kind of loost trust in them. We have another garage in the next town (as in not in the village like the last onee) so we were thinking of just getting a price from them if they do it. Get it all fitted and bought from the garage. Possibly a more expensive way of doing it but it is easier. Is this a good idea? We are not thee types to attempt it ourselves. Or who to use? We live in south Cumbria if anyone local has a good recommendatiojn in the area.

Now the make and model of tow bar, what is good for our use and car? I don't fancy the idea of something that is totally irreversible due to a bumper cutout. Are there any tow bars to avoid for this or other reasons? Are there any worth stretching our money to get?

What type is best for the Octavia Mk3? Swans neck? Flange and bolt? Removable or fixed? We got a simple bolted flange towbar on our Vauxhall Vivaro van we had before this car and it worked but they kind of suit the van shape and made sense being cheaper.

Then there is the electrics. For the van we got a modern socket with an adapter to suit the towbar so it was future proofed if anyone wanted to tow a caravan I think. Should we go for the same?

I really have no idea of towbars and cannot decide what we really need. So any advice and recommemdations graatefully received.