Moving radiator air to water system

Hello,

I visited my future house still under construction today. I noticed that the radiators will be mounted in a couple of position that I really don't like because will sacrifice walls that can be used for storage. So I'm thinking to move in different location, in the same rooms, once that I'll have the keys because unfortunately we cannot change anything until is in construction.

Is it a tricky and expensive job or a plumber can do it quickly with reasonable price? They are both around 140cm wide and will be relocate in the same rooms just in different position. Thanks