brocel,if you think your mother wants to see her son cold body six feet deep because of her,then you are dead wrong.i can't talk about the pain of losing your own mother(i have never lost mine),but i am sure she doesn't want you to end your life.it's normal for most catholic monasteries to allow guests.you could spend some time with the monks,and see if that feeling of loneliness gets a bit better.you could also join clubs and whatnot,but as most monks are above 40,you might feel more comfortable with them.
you have spoken about your mother before.you could get her water from lourdes.that water is well known and many healing miracles have been attributed to it.some of them have been verified by real doctors,who can't explain away the sudden healing.The miraculous medal,and the green scapular(for the scapular you will need to have it blessed by a catholic priest),are also known to heal deadly diseases,so it's also worth a try.getting water from lourdes is a bit complicated,but people in etsy sell it(be careful and check to see if it isn't a scam) or ask nuns and tlm priests(tlm means the latin mass.latin mass priests are more trustworthy in these matters usually) if they know of someone who has it.i know of a nun house where they are mostly all nurses and the like and they have gallons of waters from lourdes,so if you search for nun houses in your city,see if any of them have anything to do with the sick and maybe the elderly and they might have it,
don't know if holy water is known for helping diseases,but anything holy can't do man any evil,so you could also get it.no idea how most people get their holy water,but i am sure your local tlm priest would be glad to help.
there is also the 54 rosary novena which supposedly can do wonders,but she would have to do the prayers herself(i mean you could do it and say in your petition to our holy mother that the rosary is intended for your mother,and yes it could work that way,still i think it's better if she prays it herself.if she doesn't then pray for her.heck even if she does pray,also pray the novena).i did it once for my stomach issues,and my stomach issues got immensely better after it, so yeah.it could have been concindence but considering just one week before i finished the half of the novena(often in this novena the request is done after the first half) my stomach was a decent mess and in less then a week it got immensely better even though i have been struggling with it for 5 months,it is quite something..whatever my story is,that novena has done much for many people,so it's also worth a try.
i assume you aren't religious,but even if you aren't,it is worth a try.it's possible our holy mother could heal her.at the end of the day,it's about our lords will,and sometimes our lord does stuff we don't expect to happen.miracles being one of them.at the end of the day brocel,you have nothing to do lose by getting your mother these things.