i'm a .net programmer and just began android development, although I doubt you want any developers working on your budding idea. I just paid over 1K for a backlit poster frame, those need to go out of business ASAP compared to what you're building here. Get a cheapo TV instead of a smallish' monitor, can easily be all done under 1K.
What you're doing here (packaged with a TV) is worth 1K in itself!
IN PROGRESS - Outdoor Theater:
Epson G7500U, Carl's Place CIH 21ft wide x 9ft screen
Epson 5040UBE, Denon S920W, Philips BDP7501, NVidia Shield TV, PS4 Pro, SI 110"