The Home Depot

They have signs at every door to wear a mask and they enforce the rule in the store

In most cases & where available, most Home Depot stores near the ENTER doors there are bins for bad light bulbs, batteries. I heard they may consider more items to recycle but not sure what yet if they had not started already. Hope this info helps.? All else fails, you can always stop at the service desk & ask for information. YES THEY DO MR. POULIN.! Maybe the store you go to but most do recycle & I seen it while on vacation at HD in Twentynine Palms while with my family whom does construction work & watched him put the old batteries in proper bin. That was in September when I was visiting CA. Sorry if sounds rude, was not my intention to step on people's toes. Hope this info helps.?

Personally would call Builders Supply in Yucca, they deliver at 1/3 cost of Home Depot, better quality and maybe cheaper

Short answer, no it won't bleed through. In any reasonable scenario of variables (combinations of paint/grout types etc), you should be totally fine. To start, grout once mixed isn't very absorbent. It's also rather viscous (thick), as are most household paints. For bleeding to occur it will happen through absorption, capillary action or some sort of dissolution. And that's where i realize this is getting wayyyy too science nerd heavy, even for the extended answer. So in summary go for it you'll be fine. If you're really worried about it though either let the paint dry first, or take some scotch tape around the tile edges to create a protective dam that is easily applied/removed.

Depends on store but most sell both, real & artificial.

They vary in all kinds of prices shapes sizes and brand names just go to their website and you see what they offer or you could go down there and see for yourself wide variety