Never any need to apologize for being busy, Gray- I think it’s something everyone can relate to! Always feel free to take your time with responses. There’s no rush around here 
They’ll absolutely work! I love my switch on candles- I have some that flicker and give a really nice atmosphere, and most importantly they are kitten safe. I don’t have to worry about singed fur when curious cats come poking around my spellwork space 
I’d say just one candle is enough for many spells, but four is even better- with four you can put one in each of the four directions 
Do you have a drawer or shelf you could use? Storage boxes are also an option for some folks 
For inspiration, you might want to browse through some travel altars- they are often made in very creative ways, can be portable, and store well in small spaces.
Here are a few discussions where you might get some ideas!
- Temporary altar and how to store
- What is the best way to set up a travel altar
- Altars in apartments
- For everyone who practices on the go/small living quarters
You are very welcome to share pics if you feel called to do so- I know I would love to see what you are working on! 
There’s actually a great place to share altar pics (and get inspiration from seeing others’ altars) here: All Altars! Feel Free to Share Yours with the Coven 
Wishing you all the best as you bring your altar space to life- blessed be, Gray! 