You only need one UTH. These can be found at just about any pet store but online they are probably cheaper. A thermostat which the UTH plugs into is a must have. This will prevent the UTH from overheating. The hides.. The biggest reason the coconut hides are not very good is they are very porus. They will absord moisture and grow mold very quickly if your BP spills its water. Try the plastic ones or do like some members here have and just pick up some small plastic cereal bowls from a dollar store. Cut a hole in each one and there you go. When your BP no longer fits in its hide and the hide looks more like hat on your BPs head, just buy a bigger bowl and do it again. Just remember. Tight fitting hides are best. your looking good on the rest. Dont forget a spray bottle to mist the tank. And you will probably want to use something to cover most of the lid to hold in humidity and heat.

Your list looks good for a first time owner. Just dont forget the thermostat to control the UTH.