Your video helps a lot! What is the make and model? No front access panel at all?
If you can remove the fan shroud and fan you *might* have enough room.
Of course you will remove the two intake hoses on top of the motor as you pointed out.
Might be helpful to rig up a narrow platform of sorts so you can lay over the motor/dogbox area without laying ON the motor. Same problem plagues us 7.3L guys from the front- why I mentioned the topside creeper- but that won't help you inside = DIY setup
Are you setup to jack up and/or support the front end safely if you remove the front wheels?
It looks like you have fairly easy access, but you'll need room between the motor and the radiator. Shroud definitely removed. Radiator isn't a bad idea for room and protect it from damage. The fins are also VERY sharp!
Lots of reaching and stretching. A creeper, good drain pans, lights and tools.
The belt, water pump, tensioner, water pump are all on the front. Remove the one in the way first, move onto the second. Peel back the layers, so to speak. Replace in reverse order.
Do you have a cordless ratchet? Very helpful in tight spots.
Here's one from Harbor Freight that is pretty good.
Impact wrench? Helpful to remove bolts on pulleys, break bolts loose, etc.
Penetrating fluid, gasket scraper, disposable gloves, face shield (fluids and debris when you are working from below), hand cleaner, shop towels, magnetic tool dishes etc.
I lay shipping blankets over fenders, batteries, engine areas, etc when working over top of them. Helps prevent loss of tools and parts and makes nice place to set tools and parts.
I might do the work myself to save $400. You are looking to save a TON of money. I would definitely do it from what you've shown in your video.
Does your brake booster use Mercon V transmission fluid?
Go for it! :C