Considering buying my mother a ductless heat pump to replace portable air conditioner

My mother stores her portable air conditioner up in the attic of her home throughout the fall and winter.  In the spring, she asks my brother, Paul, and I to carry it down and install it into her bedroom window.  The air conditioner is at least twenty years old, and it is enormous and heavy.  It takes my brother and I, working together, to manage to install it.  It is a difficult and lengthy process.  We need to navigate that bulky air conditioner down a very steep and narrow set of stairs, carry it down a long hallway, through a door way, and then get it up into the window.  It barely fits in the window, so it requires a great deal of adjusting.  By the end of the installation process, Paul and I usually have hurt our backs.  Because the air conditioner still operates and provides a tremendous amount of cool air, my mother refuses to get rid of it.  When the weather cools off, Paul and I need to once again remove the air conditioner and cart it back up into the attic.  We have talked about purchasing and paying for the installation of a ductless heat pump for our mom.  The heat pump would be permanently installed, and provide both heating and cooling capacity.  Although the ductless unit would be far more compact than the old portable air conditioner, it would be equally as powerful and certainly more energy efficient.  My mother would benefit from the mini split all year long, without losing the view from her window.  

ductless heat pump