I have moved many many tanks for customers, its not very fun, I dont like it, but I do it if they want to pay, it helps if you have extra tanks setup to hold livestock but I have done it without many times too. I say go for it, its very doable, just not fun. How not fun? I charge $1000-$1500 to move a fully stocked 150-230gallon. Good pay for one days work, but what a pain in the ass, re-plumbing fitting, dirty equipment, heavy loads...