Something that is different for every one of us is how much our time is worth and how much we like doing the work ourselves. Personally, I like being able say I did it myself, but many times that just isn't feasable. I can make 210. in less than 4 hours, but there is no way I could do the tank in half that amount of time including all the running around you would have to do for supplies. And then there's clean up...
I have 2 jobs, 3 kids, 0 time. Yep, new tank.