the most affordable option in the ua-5 as an all in one box
if you already have the denecke ad-20, you can add the denecke ps-2 for p48....
there are a shit ton of options really for a 2 box small set up...
sd mp-2, aerco mp-2, psp2, psp3, mv100, sonosax... etc etc etc fpr pres
adc20, ad-20, sbm1...
all these are portable/stealth... there are many more portable with a larger footprint too...