Something breaks and you were the last to use it...
Something breaks and you were even near it and never touched it...
They mistakenly pack one of your cases or take yours out of the pot instead of theirs.
Or the other way around.
Material issues. Space issues.
You'll always be the puppy that gets to eat after the other puppies have had their fill.
It doesn't have to work that way, but generally it always will.
Only three gas jets and there are 3 of that lab's techs plus you needing a gas station, guess who gets them.
Buying your own materials and keeping them separate? Ever shared a fridge at work?
Using their materials. How do you keep it straight what's owed? How do you use what they need simultaneously?
Tool sharing has similar issues as well. Ralph's favorite carver goes missing, who gets blamed? Yours goes missing?
The lab you're looking to be in has their patterns and routines. You're gonna come in and be expected to fit into those without disrupting their workflow. Not gonna happen.
Think of it as being the 6th roommate moving into an apartment with 5 bedrooms. With 5 people who have known and lived together for years.
It is not impossible, but it takes lots of effort and forethought on all parties.
More than dealing with finding a cheap spot and grunting your way through the beginnings yourself. And it'll be way more rewarding when you get all the toys they take for granted.
Edit: if you go through with this, actually create a business plan, get a lease and get renters insurance. Don't skimp on doing it right.