Spread throughout the 4 buildings, there are approximately 120-150 old people living here. The families of most of them moved on without looking back, abandoning their parents/grandparents to the fates. A few have maintained communication with their relatives, though. You finally find one elder couple, the Jenners, that have a grandson whom works in construction. Well, worked. Times are tough, and he is currently unemployed. That is fortunate for you, perhaps, because he is available to come out and look at the place immediately.
Building/Renovating: When Renly gets there, he first goes to visit his grandparents. He seems to be a normal, mostly good kid(if you can call a 28-year-old a kid) that loves his family. After that, he follows Quark around the complex. As Quark tells his ideas to Renly, Renly nods and offers suggestions here and there. He mentions that it'd be possible to put connecting bridge between the quad's buildings. This would give extra room for improvements and provide a roof for the area beneath. It might also offer some security benefits or drawbacks, depending on how it's used.
Planting/Beautifying: The Carmichael family owns a greenhouse. They would be more than happy to provide both plants and gardening/planting assistance.
Recreation Area: There are many empty apartments spread throughout the 4 buildings. Walter tells you that you're more than welcome to use one on the first floor of building A for a communal rec. area. The one he suggested has an adjacent vacant apartment, so you can knock out a wall if you want. He then goes on to tell you how much of a godsend you and your fellows are, and how good you boys are, ad infinitum. He likes to ramble.
You realize, even without the aid of a Matrix expert, that setting up any sort of electronic security will probably be hindered by the complex's belief-defying lack of wireless signals.
Whatever is down in the Bunker, it creates a field of jamming. It gives ECM 4 and is immune to ECCM. Only signal 5+ devices can use any wireless functionality. You'll have to get some high Signal hotspots or something setup outside of the ECM field before you can use anything like this.
The surrounding buildings are all officially property of the government. The area was marked as condemned decades ago. Meanwhile, tenants have come and gone. Most recently, a gang war drove away all of the people brave enough to live in them. Even more recently, rumors of a major haunting event that slaughtered the invading gang has put an even stronger stigma on the area. People don't want to even come near it, let alone live there.