either do a 9-16 plant sea of green (i recommend 100% organic soil) in 1/2-1 gallon pots, or do a 4 plant modular scrog, or you can do a single bush scrog.. I think a 16 plant sog would yield the most tho... With a 16 plant sog you should be getting 10-20 gram colas... 16 x 14g colas = 1/2 pound, which is good weight for that dimensions... I have experience with the homebox xs, it is a very nice little tent, 6-8 oz's whichever way u do it is what u should aim for
with these small tents just try to maximize your space.....mines not maximized right now due to first grow in it and had to take clones and all that...but half my tent is taken up by a scrog screen....first time doing that also....oh yeah heres a link to my tent also https://www.icmag.com/ic/showthread.php?p=3705793#post3705793
Depends on what you're growing. While you could ScrOG up to 4 Indica's, with a Sativa, you won't have space for a single plant. Doesn't mean you can't ScrOG a sativa just that you'll have to throw a lot of it out along the way.