Ok got it. Thanks I always prefer to have my own dedicated box. As though supports are there from the DC, but i can manage myself . So its suits me. Freedom does matter.
I lease because of less expenses, for example a local server in my home, would eat up a bunch of electricuty, would require high speed conection, a backup generator, would have to be kept in cooled environment.
Whereas a datacenter already has that, plus since they have a lot of servers, they can afford security, antifire equipment, 24x7 system administrators and techs.
for important things such as websites i lease due to the above mentioned, if any hardware breaks its upto them to fix it. saying that i have just brought a 1u server to colocate but wont be hosting anything important on it so doesnt matter if it breaks as i can take my time sorting it (just a personal games server) and it will be only 3 hours drive away, i chose to colocate as it is cheaper to colo than to rent a dedicated in the UK for the sys specs i wanted. There are also companies that do 'rent to own' you pay x amount for x time and after x time you own the box and then pay a reduced amount to keep it connected at the DC