Well if you're a new customer. Then yes you can lease a bunch of combinations of receivers. Your configuration depands on how many rooms you want.
If you just want a simple 2 room set up with DVR, that would get you 1 522.
The billing difference between leasing and owning is the same except for a measly penny. So I'd go with the DHA leasing plan with a 522.
The CSR is correct about 49.99 up front and then you get it credited on your first bill. Some retailers will cover the 49.99 fee or other customers can give you a club dish number that will get the 49.99 fee waived (I can give you one if you want

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If you got more questions let us know.