I've just done one of these for my mother in law...going by what you have posted you have every chance of success if the jigsaw is put together properly.
Unlike a settlement visa which in my experience is straight forward compared to this visa being, you have to show without a shadow of a doubt that your mother well go back home on or before here visa expires.
I tell you, that's easier said than done...property and business alone wasn't going to be enough in our case, according to our solicitor to secure a visa....solid family ties also had to be proven by way of certified ID's, photos and supporting letters from those family members.
You also got to convince the authorities in your invitation that your mother wont be used to care for your children....again, ideally if you are not working, easily proven with submission of your NI Number coupled with a healthy bank balance should suffice that one.
Your mother's age is of benefit as well...she's hardly going to do a runner.
What we did to obtain this visa was to employ a visa specialist costing us in the region of £400.....the requirements were too vague unlike a settlement...an experienced hand was what was needed.
Yes, cost of this visa way cheaper than a settlement but much more time consuming.
Really, I wouldn't worry...you tick all the boxes.
Good Luck![]()