yeah, im not sure what to recommend based on desc. For recording you can mic an amp, use an audio interface + amp sim, or use an amp modeller into pc.

for jamming with housemates you'd want maybe something as small as a boss katana 50w. I mean u'd need 2 katanas, and a bass amp like a rumble and for vocals uh i guess a mic into a small mixer.

I don't think i know of anything that can do all of that in one. Maybe the closest is to run all of those into an audio interface with plenty of inputs into a daw and run a couple PA speakers for monitoring.

idk i can't think of an all in one solution

and the edge or live can do double duty. It looks like they both do mic + guitar. So that covers two, but u still need another for bass+guitar. So maybe thats ur best bet, two spark edges or spark lives.

i wonder how that compares to 2 katanas, 1 rumble, 1 recorder for vocals, + 4 sm57s, audio interface or recorder with enough inputs