Dad's about to make a colossally stupid move with his money, reverse mortgage KNOWING its a scam!! What can I do?

first let me say he does NOT need one, i came here to help him as he ages. i gave up my section8 apt to move into a filthy house in disrepair that i had to get my dope fiend brother , who was abusing dad, out of here. ok. ive cleaned this house, you can breath. because bro had taken out credit cards in dads name without his knowing, first thing i did was put all accounts online. i check in on them now and again, make sure dads doing ok. well lately hes been bouncing checks. when he does this in the past, i always know because i get called the mooch. when hes REALLY off in his checkbook, he crys poormouth and tells all who will listen im putting him in the poor house. i have solved every problem he has thrown at me. and that pisses him off. to the point he sabatoges me. well right now we have relatives from back east here. they got here yesterday. all was cool.until he 'took them to see the model airplanes' yeah, i know what that means, he will be gone for hours then return with guests shunning me.well, the male of the two went for a ride with me to the beach.( a last stich effort on my part to 'not be so unsocial' when im clearly being shunned, i said i was going to beach, anyone want to come with? he said yes.i was shocked ) so hes fidgeting, so i finally said about the reverse mortgage. and he was about to tell me how its dads money to spend as he wants, well, then why the hell am i here? hes not handling his money properly, i dont want any part of it, and nobody will hear me when i am trying to protect him from a stupid move!!
im just going to do this, wanted to run it by this board first ( you guys are usually correct) im going to go to court and ask a judge to appoint a guardian at leightem to handle his money. good idea or bad? i am the only one thats NOT after his money! if i werent here, he would have someone else stay here, and i promise they wont be able to clean this house with pride like i have been, even tho my sis doent have to work for her half, im not greedy. im the adopted kid and i have zero sense of entitlement, but we had an agreement. i didnt give up my life and past few years to walk away with nothing! i dont work for free.i didnt bust my ass here being berrated and treated like scum to walk away with nothing, but i have have it up to here more than a few times. i have packed my car and left. and he calls, where you go? i need you here, i cant take care of this place by myself im an old man... so wicth is it, are you just and old man or are you superman? im sooo done. then we get back from the beach and his wife is picking a fight with me in my own house! i said you dont have to rude, she said yes i do! im an excon. to me thems fighting words.. i walked away, when she was in shower, i tried to tell dad, she needs to tone down her attitude. he tells me im instagating, and i have a short fuse! seriously?! ok... im done. im 'putting him the poorhouse' but he takes everyone to dinner.well, not me of course. right after 2nd round of her smart ass mouth , then they say or are you coming to dinner? yeah because that sounds so fun...
my job was to help him so he could stay in his own home. all 2200 sq ft. he owns this house. hes on ssi, 9 credit cards, 5 with zero owed. 8000 total for all 9 cards.. hes got a shop with $50,000 worth of tools.hes got firearms worth an easy $45 grand. every problem he has tossed my way i have solved. but he cant balance his check book, he thinks he has an upper middle class paycheck when hes on ssi. he gives 20-30 to church,the eagles, the vets, the rams, etc.. you cant give to charity when your on ssi. hes mad he cant cut spending on my behalf because he doesnt spend any on me.he wont see a debt counsler, hes not in dire need. no cards are deliquint, he owns his truck i own my car, he wont let anybody look at his books. because he would have to admit its him thats not handling things, but hes blaming on me and dumb ass people are fixing to lynch me! i DO have copies of his credit report, his credit cards, all of them, he doesnt need a reverse morgage! relatives are trying to get me cut out of the will like he cut bro out, but im the ONLY one thats here ,cleaning putting up with him, and i dont know what to do. i cant walk away and leave him helpless, but im about to anyway. but i want my half of this house. im the only one thats worked here, i brought it back up to code by myself, he wont even sign a paper that would allow me caregiver money. why? hes a jerk.but until i find a new sucker, im stuck. but court... good idea or bad? thanks