On my side note:  I don't 'mind' 5 adults in my little house; but if I were 21 - I wouldn't be wanting to share a bedroom with my sibling anymore - particularly a small(er) bedroom!

STRs are easier for siblings coming in for a wedding and all stay in the same home and feel like they are in a home! 

I'm the successor trustee on a home in CA in a living trust left to me and my siblings. 

If they were my children I'd have no issues leaving my 16 y.o. to watch two siblings, and if I was the LL I'd stay out of the situation myself as well.

If one of the heirs agrees to that and she has 3 other siblings, am I only buying 25% interest in the overage ?

One of the siblings is performing property management duties and I agree that fee $240 must be eliminated.

., a grandchild; (2) sibling, half sibling, or stepsibling; (3) parent or other direct ancestor, e.g., a grandparent, but not a foster parent; (4) stepparent; (5) niece or nephew; (6) child of half sibling; (7) uncle or aunt; or (8) child-in-law, parent-in-law, sibling-in-law.  

Is it possible to gift all of it (in $10,000-15,000 increments) to 7 of my siblings (I have 9) to avoid capital gains tax? 

Check this out as another example...https://leasehackr.com/blog/2017/11/14/sibling-rivalry-all-new-2018-honda-accord-416month-vs-acura-tlx-291month

Also, if siblings are in the picture then it may become hard to make sure the will is airtight and the OP is really inheriting the entire property.