There are ways to minimize the number of antennas. I think you could get by with a couple of antennas but you’ll be compromising performance. But if you figure out where you want to concentrate your attention (which bands are most important) you can manage.
An end fed half wave can work well for the HF bands without looking like a n NSA station. It’s just a wire strung up and blends into the background, but it stops at 10 meters. Or, if you’re willing to compromise performance a little more the Diamond BB7V handles HF and 6 m.
There are many decent multi band antennas. I would look for one for 2 meters, 1.25 meters and 70 cm, like the Comet cx333, but @marcspaz has had good success covering GMRS with a Diamond antenna.
Otherwise you’ll need another dual band antenna for MURS and GMRS.