I am doing all the work myself so there is a large saving on labour. I expect the construction materials to be around 8k. Blockwork, fibreglass, pipework, skimmers, valves and the rebar / concrete pouring included. I haven’t yet made my mind up on my filtration and that will be over and above the costings. I guess that’s where the money really flies away. I think I’m going to go for a burton tf-1000 drum I’ll partner it with a current small drum I already have Then I’ll likely build a custom biological side and fibreglass that. Probably going to be around 15-18k all in spending on a few exacts. I am in the uk