straight up noob for difficulty level but i was cleaning up my project room and discovered this old router i had that was going to be tossed in the trash. so i gutted the thing and managed to fit my pi 4 4gb in there. i still had the upright desk mount adapter too. it actually looks pretty cool in real life. i printed out a pi logo and cut out the excess (the black of the router was much deeper than of the picture).
for now, i have a type-c cable and micro hdmi cable going directly to the pi, but like my nas in a can, i would like to install panel mount recepticle a for hdmi and power. finally, a small fan will also help. i installed some heatsinks i had left over from my pi 2 that i never used.