You can get 4gig GT740s for under a 100 bucks brand new in the box................

8gig R9 390 Radeons for just over 300..............

And, if you're running Poser on a laptop those cards won't be much use.

You can hook any PCIe desktop card to a laptop and use it to render with as long as it has either an Express Card or Mini PCIe slot that the wireless card is plugged into. Almost all laptops have wireless thru Mini PCIe and many have Express Card slots or the option to swap something like the DVD drive out for one.

OK, so we're at $100.00 or $300.00 how much is this little rig gonna run someone?  My research says between $199.00 and $279.00.
You do realize, of course, that $100.00 is a LOT of money for a hobby, right?  I mean most of us are HOBBYISTS.