Welcome,
Just replaced an older hot tub with a new Jacuzzi. Electrical parts cost was about $100USD (breakers and outside GFCI box) plus about $5.50USD a foot for wire, conduit, connectors, etc. I did the Electrical install myself.
The dealer was charged $350 USD by the delivery/install service company as our dealer contracted this out to a service company that supports many of the spa dealers in the metro area. They used a custom trailer and dolly setup (probably to costly for a mom and pop dealer doing their own installs). The tub was transported to our home in the horizontal position on the trailer. They then tilted the spa up on its side onto the dolly (using the tilting mechanism of the trailer) and wheeled it into place along side a lift bag (our deck is 5 ft off the ground). They slide the spa off the dolly onto the lift bag, still on its side. They tilted one edge of the spa onto the deck, Inflated the bag about 3 feet up and then the three hairy legged lumberjacks slide it into place. I did remove the wood deck railing prior to delivery and reinstalled it afterwards.
Our old and new spa set outside with no roof overhead. Over the prior 18 years we went through 3 covers (6 year average). The issue with outside spa's is damage to the cover (tree limb puncture holes?) and cracks from aging that lets water inside. Once waterlogged they become very heavy and ineffective at keeping the heat inside. The best product I have found to keep the cover material in good shape and defer the Sun's effect on aging and cracking is 303 Aerospace Protectant. It is much better than the silicone based products like ArmourAll etc.
Weekly: I use a Bromine system (floater) and it is a weekly/weekend 10-15 minute exercise to test the water and adjust chemicals as needed.
Monthly: Pull the filters and clean them
3-4 time a year: Drain the water, refill, and re-balance (chem) the water.
Good Luck and Happy Hot Tubbing