Thoughts about housing just one horse?

I leased a 24 yo Appaloosa mare for about a month and since then, I was given the option of buying her, which I am. Presently she is being boarded at a neighbor's barn, but it has always been my dream of not only owning my own horse, but housing it, too. I have been getting a lot of "flack" from my neighbor for wanting to bring my horse home to live. I understand that horses are herd animals, but I feel that she will get better care and much more attention if she is with me. Where she is now, I have no control over how much she is fed, when she is fed, how long she has to wait before being fed or even brought into the barn. In the spring her stall floods out and I have to buy extra bedding (I use pine pellets) just to keep her dry. Because my neighbors are afraid of being sued by anyone, I am not allowed to bring any family or friends up to see my horse. At home I have a German Shepherd, and he and my horse get along. My husband and 78 yo Mom want my horse brought here as well, so she will definitely be getting a lot of attention and this would be the only way for my mom to see her. I have no room or finances to keep any additional animals for company, but by no means will she spend her days completely alone. I'd appreciate your thoughts on this....