Im currently living in a home that was originally one of my rentals. It is at the end of a cul de sac and my wife and I have decided we want to 'own' the entire street over time. Just a few months ago one of our neighbors house came up for sale and we bought it...as a matter of fact the renters are moving into it today...another house (two doors down from us in the other direction) just came up for sale for a good price so we are working on getting $$ together to buy it as well. We know that at least 2 more houses on our cul de sac are coming up for sale in the next year and a half. If we can get those as well we will own almost 75% of the street and be the "King and Queen" of the neighborhod! lol.
Acutally, we will probably be moving out of there here soon (and turning our house back into a rental again) but by owning most of the houses on the street it will help us keep a 'standard' for the street and help keep everything looking nice. Also, we have realized that everytime we get a 'good deal' on one of the houses on the street (below PVA and market value) it helps on the next purchase on the street because it is a lower comp to compare to and justify the lower offer/purchase price. I'll keep you posted on any problems we have in renting to a neighbor. Good luck!