There was a previous discussion about renting, mainly revolving around the availability of rental boxes in OpenSim. Here is the thread:
http://www.kitely.com/forums/viewtopic. ... 8540#p8540
I would imagine that most of the people who plan to rent out homes/apartments/land/etc. have a fixed-price Kitely world and therefore won't be billed extra no matter how much time their tenants spend in-world. That is definitely my situation. I have a 4 region grandfathered world with 100k prims available the 100 avatar concurrency limit. I don't need all that space and resources for my own usage so I plan to rent out a few lots along the edges of my world. I've also created a small marina where I will offer slips for rent for people who would prefer to use a stationary boat/houseboat as their home base in Kitely.
Okay, I'll agree that most people who are currently active in Kitely have been attracted to this grid because they want scads of land to develop on their own. But as the grid develops, and particularly after full HG support gets enabled, there will eventually be some people who would like to use Kitely as their home base in the OpenSim metaverse, but don't want to bother developing their own fully set up region. A few of these folks will probably just rez an LK freebie home somewhere on their free region and be done with it.
But other new Kitely residents may actually want to live on a Kitely world that has a certain amount of "infrastructure", but don't want to have to create that infrastructure themselves. Others might be looking for a world where they could actually run into other residents from time to time. It's hard to do that if you're sitting in your freebie home on your freebie region. Plus if your only home is on a freebie region you need to pay for your own visit times, and for time spent in your world by any of your visitors.
Obviously there will never be a call for land barons as the concept exists in SL, but I'm betting their will be a modest demand for homes, apartments or small lots for rent on fixed-price worlds where the owner has some extra space and resources. The tenant gets a Kitely home base on a fixed-price world (giving them unlimited access for themselves and their visitors at no additional cost) with some infrastructure and/or with some traffic and visitors that they don't have to generate themselves. The landlord gets a bit of help covering their monthly rental costs for their Kitely world, and possibly even additional traffic generated by their tenants and others visiting their tenants. It's a win-win situation, really.