bro 15k to 20k
With screen and input devices na or wala pa?
If meron na, something like this would likely do:
Intel Core i3-2120 Processor
Intel DH61HO Motherboard
Kingston 4GB DDR3-1333 RAM (1 stick)
Sapphire/Powercolor Radeon HD 7750 1GB DDR5
Western Digital Blue 1TB HDD
Cooler Master Elite 371 w/ 460W CM PS
These items will total close to 20k. Using just 1 stick of RAM will leave the other slot available for future upgrades. Dagdagan mo na lang ng RAM and ODD later on, as necessary.
Depende din sa expectations mo. Sa video editing kasi nakakabilis yung Quick Sync feature pag supported ng software (lalo na during encode), kaya recommended i3 at least. Sa games naman critical yung graphics adapter normally, and not so much the processor. Since you plan to do both, medyo masasagad talaga budget mo, unless you're willing to take a performance hit in one of those activities.