If your chosen style of vaping is to use stock coil tanks at 50 watts then you should expect replacing coils to be your biggest expense, it`s a fact of life, if you cant be bothered to learn to rebuild from scratch you`ll have to accept the vaguaries of stock coil vaping. If there were a perfect tank with a magic coil we`d all be on it and nobody would buy anything else.
There are decent stock coil tanks and coils out there, a few have been mentioned already, but the vapers using them know and are willing to accept their costs and limitations.
You mentioned that you used to build those fiddly little ego coils, well building 3mm coils into a 24mm deck should be a doddle for you.
My advice would be to buy a decent stock coil tank and some coils to enjoy whilst you are relearning how to build a decent rta with coils that will give you the flavour you`re looking for at a cost you find acceptable.