What do I do with my dad who is living alone but shouldn't be?

My dad lives by himself my mom passed away 11 years ago dad has parkasions and other health problems I have been staying with 4 days a week for 4 months I can't stay with all the time because I have a house of my own and a husband and a 10 year old daughter I can't stay with him any more because it is affecting my marriage and child with me not being home very much and because I have not been able to work finances has been bad. We have given dad many options of moving in with us he refused he will do anything so I can be with my family and help him also he pays a lady 600 a week to stay with him 3 days and I am afraid he will run out of money he has land at the lake to sell but he won't do it he has a brand new truck that he can't drive he could sell he will not do that he will not give me poa because he tells people that he doesn't trust me he has his girlfriend to do all of his banking she won't do his bills because she says it my problems because I am his child but she has no problems going to the bank and drawing money out for him. My dad talks down to me all the time his temper is driving me crazy to the point I have became depressed and my axiety is off the wall I have brother will not realize how bad dad is and offers no help my daughter therapist says I need to get out of saturation. but yet I am being told that he can't live by himself I just don't know what to do anymore others than just walk away and let him figure it out on his own