Don't go off the partslist I made, use this as a guide since I don't know the prices in the Philippines
I'd get the cheapest R7 240 at the store and crossfire it with the A8 7670K, not essential, you can live without a discrete GPU since I chose an APU.
Get the cheapest FM2+ motherboard with one of these chipsets: A88X, A78, 68H and A58.
I chose a 32MB cached HDD so you are less likely to have 100% disk usage.
The PSU you have was a fire hazard, so I chose an EVGA 500W since it has a 80+ efficiency rating, a Corsair CX would be better.
Get the cheapest case,
I picked out the cheapest 4GB ram kit, Higher speed ram would be nice in an APU build but it also costs more.
I picked this monitor in particular because it was IPS, but there are cheaper displays
PCPartPicker part list / Price breakdown by merchant
CPU: AMD A8-7670K 3.6GHz Quad-Core Processor ($89.99 @ Amazon)
Motherboard: Asus A68HM-K Micro ATX FM2+ Motherboard ($33.20 @ SuperBiiz)
Memory: Team Elite 4GB (1 x 4GB) DDR3-1600 Memory ($17.99 @ Newegg)
Storage: Hitachi Ultrastar 750GB 3.5" 7200RPM Internal Hard Drive ($34.99 @ Amazon)
Video Card: Asus Radeon R7 240 2GB Video Card ($49.40 @ SuperBiiz)
Case: Azza Cosmas ATX Mid Tower Case ($19.99 @ Newegg)
Power Supply: EVGA 500W 80+ Bronze Certified ATX Power Supply ($19.99 @ Newegg)
Monitor: AOC I2269VW 60Hz 21.5" Monitor ($99.99 @ Best Buy)
Total: $365.54
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2015-11-02 01:32 EST-0500
Linking 2 PSU's should be safe, all the connectors work just the same on both PSU's, regardless of what is connected, as long as the secondary PSU is wired to even give power.
The overall safety of it depends on the PSU's being used.
EDIT: note that you need to wire a few pins from the 24pin connector on the secondary PSU for it to work, you can google which pins to use.
Still, just because it works on paper doesn't necessarily mean it is a great idea, consider getting proper PSU.
And it would be nice to know why you are considering this in the first place.