Can you get undisturbed use of the bathroom for 15 or 20m a day?
Usually things in there would be considered “unclean” by a lot of systems, but needs must sometimes - you can tie a piece of ribbon 3, 7 or 9 times round the U-bend of the toilet, with the intent that all that goes down cannot come back into your life (if ribbon would draw attention, tell people it’s a feng shui cure - which it also is), and use that to dispose of negative energy; use running taps to disguise whispering; even keep items in a washbag that double for magick, like a piece of knotted rope for your “circle” or whatever.
Coarse sea salt is used by some people on dry skin so you can keep some of that, maybe, or blessed oils, just make out you’re going through a phase of trying weird natural remedies. You could do an egg cleansing (limpia) like the one Euoi posted here by pretening you want to use the egg on your hair or skin…
You don’t need tools of any kind for most types of work, and if you have trouble imagining a Temple and keeping it constant, watch a few episodes of Big Bang Theory or any other series that uses a central set for most of the scenes, then use that - chuck out the furniture you don’t want but otherwise keep that scene intact because it’s probably pretty vividly recalled and you have a good idea what it looks like with people moving round in it.