In my crystal ball I see a future with a large screen ipad or other tablet mounted on a mike stand with the whole modeling program, your cheat sheet charts, set lists, and lyrics….with wireless switching at your feet. Wireless connection to the bass or guitar.
A few years back, I bought a used line6 hd500x for $300. Built like a tank, and I’m still finding new things it can do. Most of these multi’s kind of neglect the bass player, but I added a bunch of classic bass amp models for a few bucks. The tiny led screen is no bonus, but it is enough to work with, and mostly I use the editing software. The new units with big displays and labeled foot switches tempt, that would be a big improvement.
I picked up a guitar in January and decided to get serious about it. Holy crap! The amp models are just amazing. If I want a sound, I can search YouTube and somebody has made a patch. This is ten year old tech, but it still does an awesome job, and for cheap.
Tech moves so fast these days. Today’s hot shizzle product is tomorrow’s screaming deal on the used market. The quad cortex is beautiful, maybe, one day, it’ll be mine. But for now….I’m good.
The future is now with IK media amplitube and an irig HD X.
Not sure if it’ll do everything the OP asks, but it may. You can use your phone as well if you don’t want an ipad. This would be the smallest rig. Check out the videos on it. Not sure how foot switching would work, but I’m sure there’s an option.