Regardless whether you can get an RP the properties are way overpriced and will come down.

Property prices set to slump up to 20% 22SEp2008
Property prices in Dubai are set to slump by as much as 20 percent by 2011 from their peak in the first half of 2009 as housing supply begins to outstrip demand in the emirate, EFG-Hermes has said.

If Dubai properties are set to slump up to 20% why will Doha be any different as expectations are that housing here also outstrip demand? Realistically, how many people can afford to pay min. 12,000QR for rent on a 1 bedroom in the Pearl. If you buy in the Pearl now 12,000QR will probably only cover the mortgage and fees.