Slightly more seriously, you could also look into
https://www.corrour.co.uk/cottages/ as the estate is now into the holiday house rental business. They have properties at the east end of Loch Ossian. You would be able to drive from the public road at Loch Laggan.
From there, Ben Alder would be a manageable walk there and back in a day. The estate is quite environmentally conscious and is using its own hydro electricity, which appears to have involved a nice big vehicle track up the glen on the way to Ben Alder, making the walk even more feasible.
In the evening, have a nice sauna, and congratulate yourself on being in one of Scotland's remote areas, before a comfy night's sleep and driving home the next day.