Try joining local FB groups or checking out local news websites for the lowdown.

What specifically did you do differently on this property transaction, than an owner-occupied property transaction?

Penalties:Misdemeanor of the first degree: This can result in a maximum imprisonment of one year and a fine of up to $1,000.Civil penalties: You may also face additional civil penalties depending on the specific circumstances.Permitting issues: Local permitting authorities might withhold final approval, revoke the permit, or pursue other actions against you, maybe not give you the CO. 

Is there a website to see the overall change (up or down) in the real estate market by zip code?

If we can help with any General Contracting specific questions please let us know.

Are there any good websites out there that anyone recommends I try? 

I have a cash buyer looking specifically in Richardson.  

Get to know the specific neighborhood, RE is hyper-local, there is no single market in any metro area, it is comprised of many micro-markets.

Quote from @Rowan Miele: When it comes to loans, check out FHA or conventional options, and maybe chat with a local lender for specifics. 

Having separate checking accounts (and credit cards) specifically for the rental properties might help the most as far as expense organization (and tax) accountability.