First things first, don't spend so much on ram. 2 x 4 GB of any transcend RAM is good enough and any other RAM won't give such a noticeable performance boost.
Second, check if you actually need a PSU with such high supply. If your pc parts won't need so much supply, then what's the point.
Third, I'll give you a config for 35k which will run GTA V at decent graphics(Remember, even PS4 gives 30 fps only)
Config:
Processor - AMD FX 4300 (http://www.flipkart.com/amd-3-8-ghz-am3-fx-4300-fx-series-four-core-fd4300wmhkbox-processor/p/itmdhtnufz8f2z49?pid=PSRDHTNMABMMZEYQ&ref=L%3A-8830602061330952472&srno=p_1&query=amd+fx+4300&otracker=from-search) ~ 7,000/-
If you can, go for FX 6300. It will make a noticeable difference in open world games. It's a great processor. FX 4300 will just do the job. Moreover FX 6300 can be overclocked, while FX 4300 can't.
Graphic Card - AMD/ATI R7 260x (http://www.flipkart.com/msi-amd-ati-r7-260x2gd5-ocv3-2-gb-gddr5-graphics-card/p/itmdpvgcazrwhejw?pid=GRCDPVGCAZRWHEJW&ref=L%3A6612417363656788865&srno=p_1&query=R7+260x&otracker=from-search) ~ 10,600/-
Hard Disk - Seagate Barracuda (http://www.flipkart.com/seagate-barracuda-1-tb-desktop-internal-hard-drive-st1000dm003/p/itmd6uyn8vr4hrma?pid=IHDD6UYN8VR4HRMA&ref=L%3A757730624015321084&srno=p_1&query=Seagate+barracuda&otracker=from-search) ~ 3,700/-
(Or you could even check out WD blue)
Power Supply - Corsair 550W (http://www.flipkart.com/corsair-vs550-550-watt-psu/p/itmdg36xx8yzgjrs?pid=PSUDG34775NHYDHK&ref=L%3A-2676972847741057147&srno=p_2&query=Corsair+500W&otracker=from-search) ~ 3,600/-
(I've chosen 550W supply just to be safe but even 450W is enough)
Motherboard - Gigabyte 78 LMT USB3 (http://www.flipkart.com/gigabyte-ga-78lmt-usb3-motherboard/p/itmdeg8jwxzjap4f?q=Gigabyte+GA-78LMT-USB3+Motherboard&as=on&as-show=on&otracker=start&as-pos=p_1_gigabyte+usb3&pid=MBDDEG8JWXZJAP4F) ~ 5,000/-
RAM - Corsair Vengeance (http://www.flipkart.com/corsair-vengeance-ddr3-4-gb-1-x-gb-pc-dram-cmz4gx3m1a1600c9/p/itmd2rypbx4eehaf?pid=RAMD2RYPMVWCEK6E&ref=L%3A297414566724848671&srno=p_27&query=RAM&otracker=from-search) ~ 2,000/- x 2= 4,000/-
The total comes out to be 33,000/-. A cabinet doesn't matter so much that a recommendation might be needed. So just choose one that costs around 2,000/- and you're still in budget.
This config will run GTA V at 30-40 fps easy at high - ultra graphics.
Proof:
Check out this guy's channel (It's not mine in case you're wondering). His specs are similar but the config I'm telling you about will run games even better.
https://www.youtube.com/channel/UCTuCQ3O0NsY5iZwbtq42s3Q
You won't find many videos with 'R7 260x and FX 4300'.
If you save up by buying 450W power supply, then do go for FX 6300. No doubts regarding this.
Conclusion: This config can run GTA V at 30-40 fps at high - ultra settings. Enjoy! Tel me if you buy this config.