|The following is just my opinion so don't get me wrong and take this personally......|
Why would you bother?
I doubt you can charge enough to make it worth your time to expend the money necessary to buy all the equipment as well as configuring and deploying it. Even if you know how to configure and deploy the equipment it's still going to take a significant amount of time. If you don't know how, then you have to hire someone to do it for you and that's not cheap.
Then there's the day-to-day upkeep and administration. There's also those 4:00 am calls from tenants going, "My internet isn't working, fix it" and you have to get out of bed right then and there and get it fixed since they're paying you for it.
It's a whole basket of worms I personally would not consider opening if they (the tenants) can just as easily pay for their own internet. If they do it, then they, and their ISP, a're responsible for everything and you can sleep all night through, every night.
As a person who know about these things, I also wouldn't want wireless. Were I your tenant, I'd say, "No thank you, wireless sucks, I'll pay for my own internet so I'm not stuck using wimpy wireless"
Truthfully, you're trying to turn yourself into an ISP, ergo the requirement for logging, and you're trying to reinvent the wheel. In order to recoup the cost, you'd have to charge so much your tenants will also say, "No thank you" to your service since they'll likely be able to get it much cheaper from an ISP.........likely the same one you use now.
It matters not how straight the gate,
How charged with punishments the scroll,
I am the master of my fate;
I am the captain of my soul.