You can buy the projector for right around $1,000... Maybe even under $900 if you coupon/sale things correctly.
But, you arne't going to get both displays for that much money and I wouldn't try to unless you don't care about quality at all.
Figure out what you really need, then find the best that is out there - then figure out what your budget allows for. Going cheap is a sure way to end up seriously disappointed. While you can get good quality by purchasing cables from decent vendors like
www.monoprice.com - you can't go cheap on your display and really expect top shelf quality. Most often you end up with a so-so image and will constantly wonder why it doesn't look very good.
The difference between spending $500 on a display and $700 or $900 may be the difference that makes you HAPPY with your purchase for 10 years or frustrated with your purchase for 10 years. It's a good bit of money to spend to be disappointed.