A FlyerTalk Posting Legend
Join Date: Sep 2009
Location: Minneapolis: DL DM charter 2.3MM
Programs: A3*Gold, SPG Plat, HyattDiamond, MarriottPP, LHW exAccess, ICI, Raffles Amb, NW PE MM, TWA Gold MM
Posts: 102,617
Apparently the OP qualifies on nights, not stays, and plans a five night stay in a single hotel. He/she will actually "stay" one or two nights on a prepaid rate for five nights.
I would be concerned that housekeeping will report the room as unoccupied during the later nights and despite the prepayment, OP will not get credit for all five nights.