I finally got my ILR!!! Very exciting!!!

I am still working through whether or not my Mom can come here - both on her side and visa side. In terms of her applying from the States, would she fill out a SET (F) form?
We are trying to see if it is even financially feasible as I don't know if we could afford an accommodation taht would suit all of us. Has anyone else had their widowed parent come and live with them?
Thanks. This is a tough situation....