I am placing two ceiling fans on one switch 30 feet from the floor. My question is two-part...
Both fans are the same brand, Hampton Bay, and include remotes (also same and same dip switch settings... ) The fans DO NOT have a manual reverse switch, reverse is controlled through the remote(s) and neither will have lights.

Part one - typically the remote receiver is placed in the cradle above the ceiling fan and so the wiring is from the on/off wall switch to the receiver (in the cradle) from the receiver to the fan. Question one is - does the remote receiver HAVE to be here in the cradle or can I place it in a separate wall box (with a blank cover) somewhere after the on/off wall switch but before the fan? Reason is this, as the fan will be 30 feet from the floor, if the remote receiver ever needs to be repaced (for example if a lightning strike damages it), it will be very difficult to get to it. So the wiring is still the same, i.e. from the on/off wall switch to the receiver, from the receiver to the fan), just that it won't be located right at the fan...

Okay part two if I have a second fan (also conrolled from the same wall switch) and wired from the first fan (in tandum), again same fan, same remote device... will that first remote receiver also control the second fan? Or does each fan have to have it's own remote device? And if so, if I can't place it up at the fan (30 feet from the floor), where can it go?

Thanks all!

Mmmm.

Part I.
The remote receiver would have to be in a plastic box and use a plastic cover, so that RF can penetrate. The receivers typically have a small dangling wire which is the antenna. That should be toward the surface of the box.

Since the remote doesn't communicate back and it should not be rolling code like a garage door, then one remote can control two fans.

Inside the remote and the fans there are 4 dip-switchs. They come from the factory with the same settings, so you can install both fans with 1 remote. If you want to use a different remote for each fan, then you would have to manualy switch the pins.

If the reverse is controlled by the remote, usually the receivers cannot be wired elsewhere as they will require more than the 3 basic wires. What wires do you have?

And you CANNOT use one receiver to control more than one fan.

Best to leave the receivers in the fan canopies. Actually, best to get fans that don't need remotes.

If there are more than 3 wires, use more cables. You probably need 4 wires for the speeds. N, 1, 2, 3 and 2 wires for the direction or 6 wires. So two 14-3 cables.

Big woop.

The direction switch would take a minimum of 3 wires, possibly as many as six. Doing what you suggest would get complicated very quick and I would not recommend it. But I'm waiting to learn what sort of receiver the OP has first.