Yes, you can do it, it is not at all expensive and difficult.
To the contrary, the cost to build your property can be a very small fraction of the value it will gain and the income it will allow you to get from it.
Because the cost is low and fixed, but the value depends mostly if not entirely on you.
It is similar to owning a big ground for a small price, and being able to build on it whatever you want, with your fantasy being the the limit.
This is what the internet allows you to do.
In fact, for setting up your web site you need:
1) To define a name for it. This will be your “domain name”.
This is your choice, the only important point is that the name must be new, not already used by another site.
Of course you will want to choose a name that is attractive and easy to remember.
2) A service called “hosting”, that will serve as the ground where your site will find space, and where everybody will be able to visit it.
These are the things you “buy”. It is a really small investment.
Then you need to build the content, and this is entirely up to you. Some easy “building...