So im a bit of an anorak when it comes to researching and booking our holidays 🙈. I'd look at the hotels they are using and see how much they cost, dont forget you will be paying by the room, not by the number of people. Then cost in car hire and flights.
Trailfinders are really good at putting together independent itineraries so could try them if you have one close to you?
Of course with the group holiday everything has been planned so essentially you can put your feet up and relax..
I can see that they are atol/abta bonded and have good reviews so if you wanted the group, all planned option then go for it!!