Curious where you land on this - I got a few Foscams and ran them off my Synology NAS a few years back. Flash forward to now, and most of the outdoor Foscams are either no longer working or are just too buggy.
I want something cheap, easy to install, reliable, and upgrade-able (preferably not with wonky proprietary connectors or ways of working). I just haven't found anything that works yet. Reliable and easy to install usually mean wired or wireless, respectively, so I haven't been able to bridge that gap. Obviously cheap often counters reliable too. The last thing I want is to go through the trouble of installing a system only to have it fail in 2 years, then I've got worthless equipment because the system I bought doesn't play with others.
We have the same issue you have with the driveway - We can't see it from the office, or anywhere except the upstairs bedroom at the end of the hall. Very challenging, and the wife has started working from home 2-3 days a week.