1. it's really hard to create a server if you don't have experience 2.It's Gonna cost you some mone (more than 100$ for sure) to promote and buy good plugins for the server 3. to make a great server you're gonna have to hire some builders which you will need to pay them 4. then you will need to hire some developers too so the plugins or the commands will work good 5.you will need to purchase monthly hosting for your server hich can be very pricy if you want more ram and player slots
and there's many more to do so don't think it's easy to make a server.. you will need alot of time and money to make a succesfull miencraft server