Hi Donny,
have you never actually used BIAB?

As brickaboo said, you just buy a fakebook , & type the chords into biab. choose style, press play, automatic backing.

It can be as simple or complex as you want. I've had it for years and hadn't bothered to learn everything that can be done.

It can even write songs for you. You just have to keep pressing the button till it come up with something you like. You might wear your finger out, but the functions there. haahaa
It comes up with solo's, it can do melodies.
I've never tried this sort of stuff, at times I wish I wasn't such a keyboard addict, I'd probably have a lot of fun with BIAB on it's own.