As a brewer of larger batches (25g usually) I can attest to several factors here that have been mentioned.
1: It's not just that easy.
2: my electric bill skyrocketed when switching to eherms 10g batches to eherms 25g batches in 32g kettles.
a: like... wow... running up to three 6kw elements at various times during a brew day is huge.
3: You really, really, need to spend some more time brewing on your current level. If you've never used a pump etc. before, perhaps you should just upgrade your current system to make your brewday more productive and enjoyable?
most importantly, why do you desire the upgrade? what is your current setup and brewday like?
honestly I often miss my smaller rig, I could have a brew day start to finish in about 4-5 hours. with my larger system I find it often runs closer to 6-7 hours. (longer time to heat, cool, more cleaning, etc.)