Painting looks like a weekend job right up until the ceiling, the trim, and the armchair you forgot about enter the picture. Mom's room is one of those rooms where the paint is the easy part and everything around it is the real job, so decide who does which part before anybody buys a roller.
Local option: New Plan Care gives families in the St. Louis area in-home help so a parent can stay home: companionship, help with bathing and dressing, meals, and overnight care. Call (314) 405-0887.
Split the job into three piles
Start by sorting the work into prep, walls, and the high or fussy parts. Prep is everything that happens before the first stroke: moving furniture, taking down the curtain rod and outlet covers, patching nail holes, sanding the rough spots, taping the trim, and laying down drop cloths. Walls are the rolling and the second coat. The fussy parts are the ceiling, the window frames, and the baseboards, the places where a tired person makes the mistake that shows up in the morning light. Most families who regret the decision regret the prep, not the paint.
Be honest about your hands
Doing it yourself means your evenings and weekends become the schedule. Count the hours realistically, then add the ones you will lose when a kid's practice runs late or Mom needs a ride. Ask whether you can do the walls alone or whether you need a second adult to hold the ladder and shift the bed. A ladder you cannot reach from safely is not a plan. If a partner enjoys a project, the room may go faster than you expect, but if the job falls to you alone, it can stretch into a month of half-finished walls.
What to compare if you hire it out
Compare written scopes, not impressions. Each quote should say whether prep is included, whether the ceiling and trim are painted or left alone, how many coats are promised, who buys the paint and what grade it is, whether the furniture is moved by them or by you, and whether cleanup covers the drop cloths and the dust on the floor. Ask whether a touch-up visit is included after the room is in use, and what happens if one wall needs a second go. Quotes that differ on these lines are not the same job, even if both say 'interior painting' at the top.
Plan the room around Mom, not the other way around
Mom will have opinions about the color and about where her things go, and she will also need somewhere else to be while the walls are wet and the paint smell is strong. Set up her space in another room for the work days. Decide ahead of time who keeps her company, who moves her things back, and how long the room stays closed. The kids can help too, but only if you give them a job with an end point, such as taping the baseboards or carrying out the rug. A kid with a clear task is a great helper. A kid asked to just help with a roller is a very long afternoon.
The decision in one line
Do the prep yourself if the afternoons are open, and hire out the ceiling and the high trim if you cannot reach them safely. Whatever you choose, name the person who finishes the last corner, because that is the one who will still be thinking about it.