How about the NanoPi R5C ? (IND 10.000 ~ $120)
It can be configured for max $80 and leaves you with $40 for transports/customs.
Requirements:
There is a forum thread here:
You can configure it here ( or aliexpress )
https://www.friendlyelec.com/index.php?route=product/product&product_id=290
When you're satisfied with FriendlyWRT and not adamant to use only OpenWrt (and the support from this forum), it might be an alternative.
Can you provide information on this or explain what you mean?
My bad, isn't OpenWRT supported on this one?
Usb 3.0 operates on frequency niear 2.4 radio so if usb lanes aren't properly shielded then usb signals are jaming 2.4. Radio signals, need realy nice and proper shielding, had this issue on couple of routers and my logitech g603 mouse...
Judge for yourself:
But there's no official build (yet).
About the R5C, it has 1 wifi module, does it mean it is either 2.4Ghz or 5Ghz but not dual band ?
It hasn't, but you can use one of the LAN port as WAN with the right configuration. So in a way, yes it has. 
It depends on the wifi card you've plugged in. Most wifi cards can broadcast on the both bands but only one at a time. You are looking for a DBDC wifi card that can broadcast simultaneously on both bands. Of course it is also more expansive.
No, I'm very adamant to use OpenWRT.
Why isn't it official?
Can anyone just recommend a good router? I came here just for that.
try rereading the thread ...
Bro I want something that's jacked
Like something with 16 gigs of RAM and 64 gigs of storage
for ₹10,000 ($120) ? 
what he said ...
keep dreaming, or buy some old PC.
To make your dreams come true, wake up.
