I currently have a client that has asked me for advice on how to properly evict a tenant.

Very beautiful suburban area with lots of development happening in the area...well, last time I was there which was sometime last year.You've definitely come to the right place for your real estate investing career. 

Your dilemma is exactly why I took my properties back and developed a software to simplify management so I can do it myself. 

I let my contractor registration and insurance expire this year because I have nothing planned in the city proper for a few years.

If so, are there any areas to avoid or areas which are being developed?

With all these new developments there is also quite a large scale apartment development mid way through completion.

However, maybe I'm not thinking deeply enough.What other ways could investors approach a development of this size?

My primary job is land brokerage for new development, in fact I’m working on deals in your area: San Dimas, Glendora, etc.

The reason you are seeing so many for rent/lease signs is due to how over built the town is now because all the student housing developments. i.e Parkwest, Aspire, The Barracks etc.. 

In the grand scheme of things 4300 isnt a great deal of money, and if the deal (which you haven't disclosed) was properly vetted then you should be able to make up the money much faster then 7+ years.