Is it possible to put some type of lock on the door that has codes that can be changed, or a card that has to be swiped? 

Especially if it's an old house that's not up to todays codes.

I've zoned in on zip codes 76310 and 76306, but any other recommendations would be great!

I'm seeing homes that have PMI insurance on them, with higher taxes in stricter code enforcement municipalities seem to be more negotiable as well.

@Don Cuffy CA civil code does allow the counties to charge for their actual costs in providing the info in a request like this.

Next steps, talk to city about zoning, building codes, and sewer hookup, contract architect and interior designer, complete full market study, bring operator under contract, and raise some equity!  

I have read elsewhere that this is a state and local code requirement.

But you will have to take a look at some of the items that might be effected by that: outlets, light switches, other trim like window trim, baseboards or crownmoldingOnce you open up the walls and a framing inspector sees that, they will make you bring things up to code.

Be sure that the electrical is up to code.

There was no address but the zip code said 33133, which is a very expensive area.The listing had no pictures and said it was a 1/1.I called the listing agent immediately and said I was submitting a cash offer with zero day due diligence period and was ready to close immediately.The first question she asked me was if I was a realtor, to which I said no.I could hear the dollar sounds ticking over in her had as she calculated her commission going from 3% to 6%.I heard nothing for 2 weeks and then received a hold harmless form which I had to get notarized.I asked if that meant I got the property but I didn't get an answer.There were two outstanding violations for a roof repair and exterior painting required.