Having an aged mother myself living on her own I can fully understand your dilemma.
Unfortunately, without the owned land and I am assuming the mobile trailer is a modestly
priced unit you may not be looking at a lot of money for her remaining years. But here are
some thoughts. I am not an expert on these matters but have some non-binding thoughts.

1. Contact a lawyer who handles trusts—you may be able to do it yourself but usually you will
be safer using a lawyer–not cheaper but safer for all of you.

2. What is the possibility of selling her home and having her move in with one of the five siblings.
I know mine mom is stubborn enough to say no way and she wants to be on her own. However, this
would most likely be the best way to handle it. Then her money from the sale of the trailer can be used to
supplement the costs occurred by the sibling who gets the blessing of having mom full-time.

3. Again my assumption is that the trailer is paid for and the only costs are lot fees and utilities and of course
her personal living expenses. Can’t the five siblings agree, for the sake of mom, to each donate X amount of money
each month to help her stay in her place for these last years. This would have to be monitored and each would need to
make a monthly payment into a trust or checking account just like they would a car payment or visa bill.
Yes, you may need to keep that older car for another couple years or drop off that extra coke or beer and eat out
one less time each week. Have a garage sale or get a part-time job to make that payment but by all means
take care of your mom.

Dennis