I like this idea, there's no way of really knowing if you enjoy something, or are good at something, without trying it. For a lot of hobbies, this means you have to invest in the right gear.
I think another way to approach this problem is to form a group of friends, or even perhaps create a platform to connect strangers, who can then collectively buy the necessary equipment for a variety of hobbies which could then be rotated between the members of the group so that for a fixed amount everyone is able to spend a set amount of time trying out different activities to see if they stick.
For this to work, everyone in the group should be of a similar size and there should be some kind of insurance in case one member damages a piece of equipment. It would also be easier if all members live near eachother. The gear could be rotated on a predetermined basis, let's say every member gets to keep it for a year (to allow for seasonal activities), after a year the equipment is rotated and you would have another year to try out something new. Not only does this allow you to try out a number of different activities for the same amount you would normally spend on one activity, but it might also get you to try certain activities that you might not have done otherwise, since you have the equipment in any case.
Apart from being a good option for adults, I can imagine parents benefitting from such a system or platform immensely, as children tend to be curious and eager to try out new hobbies or sports, but also tend not to stick with many of them.
After a full rotation, members could be offered a chance to buy the equipment to keep, or everything is sold and the earnings could be split between the members.
As an example, 5 people could form a group and between them buy all the necessary equipment for surfing, mountainbiking, photography, playing guitar and snowboarding. Then, over a period of five years, each member would have a year to try out each activity.