Edit: Nevermind my recommendations... You said on the cheap. Just get an old Windows PC.

Raspberry is gonna be slow. Stay away.

Sounds like you are gonna need a Windows PC to do all that without a fuss.

I'd go for one of these but they still need memory, OS and a storage drive.

For HDs: http://www.amazon.com/gp/aw/d/B00HZDLNWO/ref=mp_s_a_1_1?qid=1420117092&sr=8-1&dpPl=1&dpID=41RYI9FbYkL&ref=plSrch&pi=AC_SX200_QL40

For SSD: http://www.amazon.com/Intel-D54250WYK1-i5-4250U-Processor-Power/dp/B00H3YT8CC

http://www.amazon.com/Asus-VM60-G106M-ASUS-Barebone-System/dp/B00LHYG44Y/ref=sr_1_4?s=electronics&ie=UTF8&qid=1420118442&sr=1-4&keywords=Vivopc

http://www.amazon.com/Lenovo-ThinkCentre-M73-Desktop-10AY001RUS/dp/B00FNQMNCE/ref=sr_1_10?s=electronics&ie=UTF8&qid=1420118442&sr=1-10&keywords=Vivopc