Howdy ZenidyDeveloper&Owner,
Thank you for your posting your questions about specs. I have done a bit of research on the GMA 4500M and the Specs seems to be heavily below what the recommended are. I am not saying the engine will or will not run,but either way, your experience will not be pleasant. Here is just a basic list of what people are using to run UE4 and their experiences with it: Recommended System Specs - Community & Industry Discussion - Unreal Engine Forums.
There are multiple PC sites online that have daily deals on PC’s and/or parts to upgrade. Just some examples are Newegg.com, Tigerdirect.com, Frys.com. If you want to compare multiple prices, a great site would be PCPartPicker.com.
Hopes this helps and have a great day!