bhai.. there are 5 lines at Parisal Railway Station which is just next to Alwar Station on Delhi side (around 15 kms).. these two rakes can stand there in night.. Usage of 5 lines at PSL Station is as follows..
a) Line 1 on main side of station is used for halting trains going towards rewari side
b) Line 2 - Main line for passing trains going towards Rewari
c)...
more... Line 3 - Main line for passing trains going towards Alwar
d) Line 4 - Idle line basically used for waiting freight trains
e) Line 5 - used for halting trains going towards Alwar
Also only 8 trains stop at PSL in a day.. so occupancy of loop lines is also very less.. IR can easily use 2 lines at PSL i.e. line 4 n 5 for standing idle rakes of those two DEMU or passenger trains in night.. sending a idle rake just 15 kms far from originating station cannot be considered to be a "not wise decision".. If IR is really thinking about the needs of people of Alwar then it can easily follow this type of arrangement which i hve mentioned above.. afterall catering to the needs of public is the sole motive of IR/government which they always say to public..
Now, one question which will arise in the minds of people about maintenance of trains.. so maintenance can be done in Delhi in day time as the enough idle time will be there for maintenance..