Are there any reasons (other than your guilt at leaving Leo all day) that you think he needs to be rehomed? Like destructive behaviour, personality changes, etc? If not, and it's just you feeling guilty, well, I work from home, (working right now even) and SoCo spends his day sleeping. Honestly, I work from 9-5 usually with a 1 hour break, I don't generally let him out during my 3-4 hr shifts and if I happen to go upstairs (when at home) to potty myself, I wake him up. Sometimes he's so out he doesn't wake up till I give him a little pat on the head. That's probably what Leo's doing most of the day too!
Right now I'm at our trailer and SoCo spends the day sleeping on the couch. Sometimes our bed. So I'm pretty sure having observed this behaviour for several months now, Leo is probably a bed bug too
All I'm trying to say is unless your seeing a major reason to rehome him, (which I haven't seen) than I don't think there's any reason to. It's normal to miss him, but really, he's probably too busy snoozing to miss you most of the day
Tara